S. Okamoto

发表

Synthesis of folded H-stacking skipped π polymers consisting of different 2-substituted trimethylene tethering units and their optical and conductive property

S. Okamoto, Yusuke Naito, Ryosuke Nomura, 2021 .

Synthesis and physiological activities of both enantiomers of coriolic acid and their geometric isomers

Yuichi Kobayashi, S. Okamoto, F. Sato, 1987 .

Copper-catalyzed intramolecular hydroamination of allenylamines to 3-pyrrolines or 2-alkenylpyrrolidines

S. Okamoto, Akiko Tsuhako, Daisuke Oikawa, 2008 .

Synthesis of carbo- and aza-bicyclo[4.3.0] and [4.4.0] compounds by Ti(II)-mediated cyclization of 2,7- or 2,8-enynyl-1-ol derivatives

Yongcheng Song, S. Okamoto, F. Sato, 2002 .

Catalytic [2 + 2 + 2] cycloaddition polymerization of diyne-nitrile monomers in the presence of CoCl2-6H2O/diphosphine/Zn

Y. Sugiyama, S. Okamoto, 2016 .

Chain-growth cycloaddition polymerization via a catalytic alkyne [2 + 2 + 2] cyclotrimerization reaction and its application to one-shot spontaneous block copolymerization.

Y. Sugiyama, S. Okamoto, R. Kato, 2011, Journal of the American Chemical Society.

Grignard allylic substitution reaction catalyzed by 1,2,3-triazol-5-ylidene magnesium complexes

S. Okamoto, Ryosuke Nomura, Y. Tsuchiya, 2013 .

Activity and behavior of imidazolium salts as a phase transfer catalyst for a liquid–liquid phase system

S. Okamoto, Satoshi Ishigami, Akiko Tsuhako, 2006 .

Selective dimerization of 1,6-diynes catalyzed by ionic liquid-supported nickel complexes in an ionic liquid/toluene biphasic system.

S. Okamoto, A. Goswami, Chikashi Matsuno, 2009, Chemical communications.

Synthesis and properties of folded π-stacking polymers having J-aggregative, alternative, and staggered assembling structures

S. Okamoto, Ryosuke Nomura, Masaru Kudo, 2016 .

Design and synthesis of 2-(1,3-dialkoxy-2-methylpropan-2-yl)-1,3-diarylpropanes as tethering units for folded H-stacking polymers

S. Okamoto, Ryosuke Nomura, Ryota Moriai, 2014 .

Synthesis and properties of through‐space conjugated polymers based on π–π stacked 1,3‐biarylpropane tethering units

S. Okamoto, Ryosuke Nomura, J. Watanabe, 2013 .

McMurry coupling of aryl aldehydes and imino pinacol coupling mediated by Ti(O-i-Pr)4/Me3SiCl/Mg reagent

S. Okamoto, Jing-Qian He, Chihaya Ohno, 2010 .

Non-Cp titanium alkoxide-based homolytic ring-opening of epoxides by an intramolecular hydrogen abstraction in β-titanoxy radical intermediates.

S. Okamoto, Tsuyoshi Kawaji, Noriaki Shohji, 2011, Chemical communications.

Ti(O-i-Pr)4/Me3SiCl/Mg-mediated reductive cleavage of sulfonamides and sulfonates to amines and alcohols.

S. Okamoto, Tsuyoshi Kawaji, Noriaki Shohji, 2011, Organic letters.

Ti(II)-mediated domino cyclization of 2-functionalized 1-halo-2,n-enynes (n = 7, 8) to bicyclic compounds

Shogo Tanaka, S. Okamoto, F. Sato, 2006 .

Synthesis of 2,2’-Bipyridines by Transition Metal-Catalyzed Alkyne/Nitrile [2 + 2 + 2] Cycloaddition Reactions

S. Okamoto, 2012 .

Synthesis of Substituted 2,2′‐Bipyridines and 2,2′:6′,2′′‐Terpyridines by Cobalt‐Catalyzed Cycloaddition Reactions of Nitriles and α,ω‐Diynes with Exclusive Regioselectivity

S. Okamoto, A. Goswami, Taichi Ito, 2008 .

Efficient convergent synthesis of 1alpha,25-dihydroxyvitamin D3 and its analogues by Suzuki-Miyaura coupling.

S. Okamoto, T. Wada, F. Sato, 2003, Organic letters.

Novel synthetic approach to 19-nor-1alpha,25-dihydroxyvitamin D(3) and its derivatives by Suzuki-Miyaura coupling in solution and on solid support.

T. Masuda, S. Okamoto, T. Wada, 2001, Organic letters.

Efficient and practical synthesis of the A-ring precursor of 19-nor-1alpha,25-dihydroxyvitamin D(3) and its (13)C- or (2)H-labeled derivative.

T. Masuda, S. Okamoto, F. Sato, 2001, Organic letters.

Deuteration of Indole Compounds: Synthesis of Deuterated Auxins, Indole-3-acetic Acid-d5 and Indole-3-butyric Acid-d5

S. Okamoto, Rie Kikuchi, Takeshi Yamada, 2021, ACS omega.

Biosynthesis of prostaglandins from 17(18)epoxy-eicosatetraenoic acid, a cytochrome P-450 metabolite of eicosapentaenoic acid.

E. Oliw, S. Okamoto, F. Sato, 1992, Biochimica et biophysica acta.

Grignard allylic substitution catalyzed by imidazol-2-ylidene- and imidazol-4-ylidene-magnesium complexes

S. Okamoto, Hiroyuki Ishikawa, Yuri Suhara, 2010 .

Unexpected reactivity of annulated 3H-benzothiazol-2-ylideneamines as an acyl transfer catalyst

S. Okamoto, Megumi Kobayashi, 2006 .

On-Demand Generation of an Efficient Catalyst for Pyridine Formation from Unactivated Nitriles and α,ω-Diynes Using CoCl2-6H2O, dppe, and Zn

S. Okamoto, A. Goswami, Naoko Saino, 2007 .

Stereoselective construction of 3a-methylhydrindanes starting from 2,7-enynol derivatives based on Ti(II)-mediated cyclization and Ru-catalyzed ring-closing metathesis

S. Okamoto, H. Matsushita, A. Nakano, 2006 .

Iron-catalyzed intramolecular cyclotrimerization of triynes to annulated benzenes

S. Okamoto, Naoko Saino, Kouki Kase, 2006 .

Allylic substitution reactions with Grignard reagents catalyzed by imidazolium and 4,5-dihydroimidazolium carbene–CuCl complexes

S. Okamoto, S. Tominaga, Naoko Saino, 2005 .

Palladiurn(0)-catalysed transfer hydrogenation of alkynes to cis-alkenes with HCO2H–NEt3

S. Okamoto, N. Ono, F. Sato, 1993 .

Regioselective Syntheses of Substituted Pyridines and 2,2′-Bipyridines by Cobalt-Catalyzed [2+2+2] Cycloaddition of α,ω-Diynes with Nitriles

Y. Sugiyama, S. Okamoto, 2011 .

Two-step allylic carbon insertion between ketone carbonyl and α carbons giving α-quaternary α-vinyl ketones

S. Okamoto, D. Shibata, Jing-Qian He, 2008 .

Synthesis of N-substituted 2-arylpyrroles by the reaction of (η2-imine)titanium complexes with 3,3-diethoxypropyne

S. Okamoto, F. Sato, Daisuke Oikawa, 2006 .

Highly stereoselective asymmetric construction of an acyclic carbon skeleton having two adjacent alkyl substituents by Michael addition of optically active allenyltitaniums to alkylidenemalonates.

S. Okamoto, F. Sato, Y. Song, 2001, Organic letters.

General synthetic method for preparation of optically active propargyl and allylstannanes

D. K. An, S. Okamoto, F. Sato, 2001 .

One-pot preparation of 2-substituted and 2,3-disubstituted furans from 2-alkynal tetramethylethylene acetals and aldehydes using a divalent titanium reagent Ti(O-i-Pr)4/2 i-PrMgX

X. Teng, S. Okamoto, T. Wada, 2001 .

Ti(II)-mediated tandem inter- and intramolecular coupling reaction of unsaturated hydrocarbons: one-pot preparation of cyclopentanes and cyclohexanes from readily available acyclic starting materials.

S. Okamoto, F. Sato, K. Subburaj, 2001, Journal of the American Chemical Society.

Highly Stereocontrolled Synthesis of Carbacyclin from Acyclic Starting Materials via Ti(II)-Mediated Tandem Cyclization

S. Okamoto, F. Sato, A. Subburaj, 2000 .

Electrophilic amination of racemic and non-racemic allenyltitaniums. One-pot synthesis of α-hydrazinoalkynes from propargylic alcohol derivatives

D. K. An, S. Okamoto, F. Sato, 1999 .

Titanium(II)-Mediated Asymmetric Intramolecular Cyclization of 2,7- and 2,8-Enynyl Chiral Acetals. Synthetic Equivalent of Stoichiometric Intramolecular Asymmetric Metallo-Ene Reaction

S. Okamoto, F. Sato, Y. Takayama, 1999 .

An efficient method for conversion of 1-alken-3-yl carbonates to 1-alkenes and 3-chloro-1-alkenes via allyltitaniums

D. K. An, S. Okamoto, F. Sato, 1998 .

Stereoselective synthesis of optically active substituted piperidines and pyrrolidines from amino acid derivatives by titanium(II)-mediated intramolecular cyclization reaction

S. Okamoto, F. Sato, Y. Takayama, 1997 .

Highly efficient synthesis of alka-1,3-dien-2-yltitanium compounds from alka-2,3-dienyl carbonates. A new, practical synthesis of 1,3-dienes and 2-iodo-1,3-dienes

S. Okamoto, F. Sato, Hiroyoshi Sato, 1996 .

Intramolecular Nucleophilic Acyl Substitution Reaction of 3,4-Alkadienyl Carbonates Mediated by Ti(O-i-Pr)4/2 i-PrMgCl Reagent. Efficient Synthesis of Optically Active β,γ-Unsaturated Esters with an α-Substituent

S. Okamoto, F. Sato, Y. Yoshida, 1996 .

Intramolecular nucleophilic acyl substitution reactions mediated by reagent. Synthesis of vinyltitanium compounds having a lactone and/or an ester group from acetylenic carbonates

S. Okamoto, F. Sato, A. Kasatkin, 1995 .

New, Efficient Method for the Synthesis of Allyltitanium Compounds from Allyl Halides or Allyl Alcohol Derivatives via Oxidative Addition. A Highly Efficient and Practical Synthesis of Homoallyl Alcohols

S. Okamoto, F. Sato, T. Nakagawa, 1995 .

Prostaglandin synthesis via two-component coupling: Highly efficient synthesis of chiral prostaglandin intermediates 4-alkoxy-2-alkyl-2-cyclopenten-1-one and 4-alkoxy-3-alkenyl-2-methylenecyclopentan-1-one

Takashi Takahashi, Yuichi Kobayashi, S. Okamoto, 1988 .

Palladium(0)‐Catalyzed Transfer Hydrogenation of Alkynes to cis‐ Alkenes with HCO2H‐NEt3.

S. Okamoto, N. Ono, F. Sato, 1993 .

Efficient Activation of 2‐Iminomethylpyridine/Cobalt‐Based Alkyne [2+2+2] Cycloaddition Catalyst by Addition of a Silver Salt

S. Okamoto, A. Goswami, Taichi Ito, 2007 .

A highly practical instant catalyst for cyclotrimerization of alkynes to substituted benzenes.

S. Okamoto, Fumihiro Amemiya, Naoko Saino, 2006, Organic letters.

From the Development of Catalysts for Alkyne and Alkyne–Nitrile [2+2+2] Cycloaddition Reactions to Their Use in Polymerization Reactions

Y. Sugiyama, S. Okamoto, 2013 .

Intramolecular cyclotrimerization of triynes catalyzed by N-heterocyclic carbene-CoCl2/Zn or -FeCl3/Zn.

S. Okamoto, Naoko Saino, Daisuke Kogure, 2005, Organic letters.

Cobalt-catalyzed cross addition of silylacetylenes to internal alkynes.

Y. Sugiyama, S. Okamoto, T. Sakurada, 2013, The Journal of organic chemistry.

ChemInform Abstract: Highly Selective Addition Reaction of Organotitaniums with Garner′s Aldehyde. Easy Preparation of Optically Active Allylic, Allenylic, Homoallylic and Homopropargylic Alcohols.

S. Okamoto, F. Sato, C. Delas, 2002 .

A concise asymmetric synthesis of 5,8-disubstituted indolizidine alkaloids. Total synthesis of ()-indolizidine 209B

Yongcheng Song, S. Okamoto, F. Sato, 2002 .

Efficient and Practical Method for Synthesizing N-Heterocyclic Compounds Using Intramolecular Nucleophilic Acyl Substitution Reactions Mediated by Ti(O-i-Pr)4/2i-PrMgX Reagent. Synthesis of Quinolones, Pyrroles, Indoles, and Optically Active N-Heterocycles Including Allopumiliotoxin Alkaloid 267A

S. Okamoto, F. Sato, K. Kobayashi, 1997 .

Carbonyl reduction with CaH2 and R3SiCl catalyzed by ZnCl2

S. Okamoto, Akiko Tsuhako, Jing-Qian He, 2007 .

Simple and practical method for selective acylation of primary hydroxy group catalyzed by N-methyl-2-phenylimidazole (Ph-NMI) or 2-phenylimidazo[2,1-b]benzothiazoles (Ph-IBT)

S. Okamoto, Yusuke Kosaki, Kouta Ibe, 2014 .

Intramolecular Nucleophilic Acyl Substitution Reactions Mediated by XTi(O-i-Pr)3 (X = Cl, O-i-Pr)/2i-PrMgBr Reagent. Efficient Synthesis of Functionalized Organotitanium Compounds from Unsaturated Compounds

S. Okamoto, F. Sato, P. Zubaidha, 1996 .

Asymmetric Synthesis of Allyl- and α-Allenylamines from Chiral Imines and Alkynes via (η2-Imine)Ti(O-i-Pr)2 Complexes

S. Okamoto, F. Sato, K. Fukuhara, 2003 .

Synthesis of substituted anthracenes, pentaphenes and trinaphthylenes via alkyne-cyclotrimerization reaction

S. Okamoto, Taichi Ito, Naoko Saino, 2010 .

SYNTHESIS OF CHIRAL ALLYLTITANIUMS HAVING AN AMINO GROUP AT THE C-4 POSITION AND THEIR DIASTEREOSELECTIVE ADDITION REACTION WITH ALDEHYDES

X. Teng, S. Okamoto, F. Sato, 1997 .

Synthesis and catalytic properties of 4-aryl-2,3-dihydro-4H-pyrimido[2,3-b]benzothiazoles for asymmetric acyl or carboxyl group transfer reactions.

S. Okamoto, Satoko Suzuki, Baby Viswambharan, 2011, The Journal of organic chemistry.

Synthesis of optically active α-trimethylsilyl δα,β-butenolides and their conversion into various butenolides and saturated γ-lactones

T. Ito, S. Okamoto, F. Sato, 1990 .

A Highly Efficient Synthesis of Prostaglandin ω-Chain Precursors

Takashi Matsumoto, Yuichi Kobayashi, S. Okamoto, 1987 .

A highly efficient synthesis of γ-halo allylic alcohols and propargylic alcohols with high optical purity. Practical method for synthesis of the prostaglandin ω-chain

Yuichi Kobayashi, S. Okamoto, F. Sato, 1987 .

A New Method for the Synthesis of Protected Chiral 4-Hydroxy-2-cyclopentenone

S. Okamoto, F. Sato, Y. Kitano, 1989 .

Structure–activity relationship of dihydroimidazo-, dihydropyrimido, tetrahydrodiazepino-[2,1-b]-thiazoles, and -benzothiazoles as an acylation catalyst

S. Okamoto, Shohei Nishi, Yusuke Kosaki, 2014 .

Iron-catalyzed reductive magnesiation of oxetanes to generate (3-oxidopropyl)magnesium reagents.

Y. Sugiyama, S. Okamoto, Shiori Heigozono, 2014, Organic letters.

An efficient synthesis of optically active five- and six-membered cyclic compounds with selectable stereo-controls by a Ti(II)-mediated cyclization of chiral secondary 2,7- and 2,8-enyn-1-ol derivatives

Yongcheng Song, S. Okamoto, F. Sato, 2003 .

The Divalent Titanium Complex Ti(O-i-Pr)4/2i-PrMgX as an Efficient and Practical Reagent for Fine Chemical Synthesis

S. Okamoto, F. Sato, 2001 .

Synthesis of organotitanium complexes from alkenes and alkynes and their synthetic applications.

S. Okamoto, F. Sato, H. Urabe, 2000, Chemical reviews.

Synthesis of 1-hydroxybicyclo[n.1.0]alkanes (n = 3 and 4) and their silyl ethers from olefinic esters via tandem intramolecular nucleophilic acyl substitution and intramolecular carbonyl addition reactions mediated by Ti(OPr-i)42 i-PrMgCl reagent

S. Okamoto, F. Sato, K. Kobayashi, 1996 .

Highly Efficient Synthesis of Alka-1,3-dien-2-yltitanium Compounds from Alka-2,3-dienyl Carbonates. A New, Practical Synthesis of 1,3- Dienes and 2-Iodo-1,3-dienes.

S. Okamoto, F. Sato, Hiroyoshi Sato, 1997 .

Titanium(II)‐Mediated Asymmetric Intramolecular Cyclization of 2,7‐ and 2,8‐Enynyl Chiral Acetals. Synthetic Equivalent of Stoichiometric Intramolecular Asymmetric Metallo‐Ene Reaction.

S. Okamoto, F. Sato, Y. Takayama, 1999 .

Bicyclization of dienes, enynes, and diynes with Ti(ii) reagent. New developments towards asymmetric synthesis

S. Okamoto, F. Sato, H. Urabe, 1999 .

Synthesis of chiral alkynes having 2H or halogen at the secondary or tertiary propargylic stereogenic center by hydrolysis and halogenolysis of optically active allenyltitaniums having axial chirality

D. K. An, S. Okamoto, F. Sato, 1998 .

Synthesis of optically active allenyltitaniums having axial chirality by the reaction of optically active propargylic compounds with a reagent

D. K. An, S. Okamoto, F. Sato, 1998 .

Intramolecular Nucleophilic Acyl Substitution Reaction of 3,4- Alkadienyl Carbonates Mediated by Ti(O-i-Pr)4/2 i-PrMgCl Reagent. Efficient Synthesis of Optically Active β,γ-Unsaturated Esters with an α-Substituent.

S. Okamoto, F. Sato, Y. Yoshida, 1997 .

Synthetic Reactions Using Low-valent Titanium Reagents Derived from Ti(OR)4 or CpTiX3 (X = O-i-Pr or Cl) in the Presence of Me3SiCl and Mg.

S. Okamoto, 2016, Chemical record.

Formation of azatitanacyclopentanes from ene-imines and a Ti(O-i-Pr)4/2i-PrMgX reagent and their synthetic reactions

S. Okamoto, Chikashi Matsuno, Wataru Uchikawa, 2004 .

Preparation of Titanated Alkoxyallenes from 3-Alkoxy-2-propyn-1-yl Carbonates and (η2-Propene)Ti(O-i-Pr)2 as an Efficient Ester Homoaldol Equivalent.

S. Okamoto, F. Sato, T. Hanazawa, 2000 .

Development of a Chiral Propionaldehyde Homoenolate Equivalent Which Reacts with Imines with Excellent Stereoselectivity: Efficient and Practical Synthesis of Optically Active γ-Amino Carbonyl Compounds.

X. Teng, S. Okamoto, F. Sato, 2000 .

Asymmetric synthesis of stereodefined α-alkyl-γ-benzyloxymethyl-β-trimethylsilyl-γ-butyrolactones that serve as an efficient precursor for constructing carbon skeletons having a tertiary or quaternary stereogenic center

S. Okamoto, F. Sato, Kwangho Kim, 2002 .

Regiocontrol of radical cyclization by Lewis acids. Efficient synthesis of optically active functionalized cyclopentanes and cyclohexanes.

S. Okamoto, F. Sato, K. Kim, 2001, Organic letters.

Intramolecular Nucleophilic Acyl Substitution Reactions Mediated by Ti( OiPr)4/2 iPrMgBr Reagent. Synthesis of Vinyltitanium Compounds Having a Lactone and/or an Ester Group from Acetylenic Carbonates.

S. Okamoto, F. Sato, A. Kasatkin, 1995 .

Synthetic Reactions Mediated by a Ti(O-i-Pr) / 2 i-PrMgX Reagent

S. Okamoto, F. Sato, H. Urabe, 2000 .

A highly efficient and practical preparation of 2,4-pentadienyltitaniums and their γ-selective addition reaction with aldehydes and ketones

S. Okamoto, F. Sato, 2001 .

An efficient and practical preparation of optically active syn-1-vinyl-2-amino alcohol derivatives by the regio- and diastereoselective addition reaction of (γ-alkoxyallyl)titaniums with chiral imines. Formal synthesis of statine

S. Okamoto, F. Sato, K. Fukuhara, 2000 .

1,5-Asymmetric induction in addition reaction of aldehydes with chiral allyltitaniums having an amino group at the stereogenic center. Synthesis of optically active 2,6-cis-disubstituted piperidines

S. Okamoto, F. Sato, Teng Xin, 1998 .

S. Okamoto, F. Sato, T. Nakagawa, 1995 .

γ-Selective allylic substitution reaction with Grignard reagents catalyzed by copper N-heterocyclic carbene complexes and its application to enantioselective synthesis

D. K. An, S. Okamoto, Toshio Kato, 2004 .

Synthetic Reactions with Divalent Titanium Complex

S. Okamoto, F. Sato, H. Urabe, 1998 .

Stereoselective Synthesis of Optically Active Substituted Piperidines and Pyrrolidines from Amino Acid Derivatives by Titanium(II)-Mediated Intramolecular Cyclization Reaction.

S. Okamoto, F. Sato, Y. Takayama, 1998 .

An Efficient Method for Conversion of 1-Alken-3-yl Carbonates to 1-Alkenes and 3-Chloro-1-alkenes via Allyltitaniums.

D. K. An, S. Okamoto, F. Sato, 1998 .

Ti(II)‐Mediated Tandem Inter‐ and Intramolecular Coupling Reaction of Unsaturated Hydrocarbons: One‐Pot Preparation of Cyclopentanes and Cyclohexanes from Readily Available Acyclic Starting Materials.

S. Okamoto, F. Sato, K. Subburaj, 2001 .

Electrophilic Amination of Racemic and Non‐Racemic Allenyltitaniums. One‐Pot Synthesis of α‐Hydrazinoalkynes from Propargylic Alcohol Derivatives.

D. K. An, S. Okamoto, F. Sato, 1999 .

Efficient one-pot synthesis of propargylstannanes from propargylic alcohol derivatives via allenyltitaniums

D. K. An, S. Okamoto, F. Sato, 1998 .

Two-Step Allylic Carbon Insertion Between Ketone Carbonyl and α Carbons Giving α-Quaternary α-Vinyl Ketones.

S. Okamoto, D. Shibata, Jing-Qian He, 2009 .

General Synthetic Method for Preparation of Optically Active Propargyl and Allylstannanes.

D. K. An, S. Okamoto, F. Sato, 2001 .

One-Pot Preparation of 2-Substituted and 2,3-Disubstituted Furans from 2-Alkynal Tetramethylethylene Acetals and Aldehydes Using a Divalent Titanium Reagent Ti(O-iPr)4/2 iPrMgX.

X. Teng, S. Okamoto, T. Wada, 2001 .

An allyltitanium derived from acrolein 1,2-dicyclohexylethylene acetal and (eta(2)-propene)Ti(O-i-Pr)(2) as a chiral propionaldehyde homoenolate equivalent that reacts with imines with excellent stereoselectivity. An efficient and practical access to optically active gamma-amino carbonyl compounds.

X. Teng, S. Fujii, S. Okamoto, 2001, Journal of the American Chemical Society.

Practical synthesis of optically active bicyclic oxazolidinylpiperidines, chiral building blocks for preparing 1-deoxyazasugars, from serine

S. Okamoto, F. Sato, Masaaki Shirai, 1999 .

Design, synthesis, and properties of des-D-ring interphenylene derivatives of 1α,25-Dihydroxyvitamin D3.

S. Okamoto, Takeshi Yamada, Kouta Ibe, 2022, European journal of medicinal chemistry.

Synthesis of optically active secondary allylic alcohols from allylsilanes via successive asymmetric dihydroxylation (AD) and Peterson olefination reactions

D. Zargarian, S. Okamoto, F. Sato, 1993 .

Synthesis and structure-activity relationships of a new class of selective EP3 receptor agonist, 13,14-didehydro-16-phenoxy analogues of prostaglandin E1.

S. Okamoto, F. Sato, Y. Shimazaki, 2000, Bioorganic & medicinal chemistry.

Synthesis of the key component for preparation of 6-ketoprostaglandins by a two-component coupling process: synthesis of 6-keto-prostaglandin E1, ornoprostil and Δ2-trans-6-ketoprostaglandin E1

S. Okamoto, N. Ono, F. Sato, 1996 .

A highly efficient approach to prostaglandins via radical addition of α side-chains to methylenecyclopentanones. Total synthesis of natural PGE1, limaprost and new prostaglandin derivatives.

S. Okamoto, N. Ono, F. Sato, 1993 .

A new efficient synthesis of the biologically potent PGD2-analogue ZK118182

S. Okamoto, N. Ono, F. Sato, 1992 .

Synthesis of Allyl Ester of Prostaglandin E and the Conversion of the Allyl Ester Moiety into Carboxylic Acid by Chemical Method. A Highly Practical Synthesis of Natural PGE1 and Limaprost

S. Okamoto, N. Ono, F. Sato, 1992 .

Highly efficient and general method for synthesis of tertiary allylic alcohols in a chiral form. Synthesis of arbaprostil

S. Okamoto, F. Sato, T. Yoshino, 1991 .

A practical synthesis of the ω side-chain unit present in mexiprostil and its use for synthesis of mexiprostil via two-component coupling process.

S. Okamoto, F. Sato, T. Yoshino, 1991 .

A highly practical synthesis of natural PGE1, Δ2-trans-PGE1 and 2,2,3,3-tetradehydro-PGE1 via two-component coupling process using zinc-copper reagents

S. Okamoto, N. Ono, F. Sato, 1990 .

Prostaglandin Synthesis via Two-Component Coupling. Highly Efficient Synthesis of Chiral Prostaglandin Intermediates 4-Alkoxy-2-alkyl-2-cyclopenten-1-one and 4-Alkoxy-3-alkenyl-2-methylenecyclopentan-1-one.

Takashi Takahashi, Yuichi Kobayashi, S. Okamoto, 1989 .

A highly efficient synthesis of natural PGE3 and 5,6-dihydro PGE3 via two-component coupling process

Yuichi Kobayashi, S. Okamoto, F. Sato, 1989 .

Synthesis of optically active γ-trimethylsilyl-β,γ-epoxy tertiary alcohols by the diastereoselective addition reaction of β-trimethylsilyl-α,β-epoxyketones with Grignard reagents

S. Okamoto, F. Sato, T. Yoshino, 1991 .

Dual-mode coupling copolymerization of aryl dialdehyde and alkynylaldehyde monomers via Concurrent McMurry olefination and alkyne [2+2+2] cycloaddition trimerization reactions mediated by a low-valent titanium reagent

Takeshi Yamada, S. Okamoto, T. Uchida, 2021 .

Synthesis of [CH2C(CO2Et)2CH2Ar]n polymers and their unique optical properties by through‐space interactions between Ar and CO groups

S. Okamoto, J. Watanabe, Masaru Kudo, 2012 .

Biscyclopentadienyltitanium(III) chloride dimer

S. Okamoto, F. Sato, 2003 .

Use of CaH2 as a reductive hydride source: reduction of ketones and imines with CaH2/ZnX2 in the presence of a Lewis acid

S. Okamoto, K. Kato, Chikashi Matsuno, 2005 .

Cobalt-catalyzed [2 + 2 + 2] cycloaddition copolymerization of diyne and internal alkyne monomers to highly branched polymers

Y. Sugiyama, Takeshi Yamada, S. Okamoto, 2020 .

Selective cleavage of allyl and propargyl ethers to alcohols catalyzed by Ti(O-i-Pr)4/MXn/Mg.

T. Sano, S. Okamoto, Mutsumi Ohkubo, 2007, Organic letters.

低原子価チタン反応剤Ti(OR)4/Me3SiCl/Mgの開発と反応

S. Okamoto, 2014 .

Chemical synthesis of optically active cis-cyclohexa-3,5-diene-1,2-diols and their 5-2H-derivatives

S. Okamoto, F. Sato, T. Hanazawa, 2001 .

Highly efficient synthesis of 13-dehydroprostaglandins by 1,4-addition reaction of alkynyl .omega. side-chain unit onto a cyclopentenone framework

S. Okamoto, F. Sato, T. Yoshino, 1991 .

Remarkable Activation of an Alkyne [2+2+2]-Cycloaddition Catalyst, 2-Iminomethylpyridine (dipimp)/CoCl2·6H2O/Zn, by a Phthalate Additive

Y. Sugiyama, S. Okamoto, T. Sakurada, 2012 .

Cobalt-catalyzed mono-coupling of R3SiCH2MgCl with 1,2-dihalogenoethylene: a general route to γ-substituted (E)-allylsilanes

S. Okamoto, Chikashi Matsuno, Taku Kamachi, 2004 .

Synthesis of optically active furfuryl alcohols and butenolides from trans-1-trimethylsilyl-3-alken-1-ynes via successive asymmetric dihydroxylation and hydromagnesiation reactions

S. Okamoto, F. Sato, K. Tani, 1993 .

Alkyne [2 + 2 + 2] Cyclotrimerization Catalyzed by a Low-Valent Titanium Reagent Derived from CpTiX3 (X = Cl, O-i-Pr), Me3SiCl, and Mg or Zn

Takeshi Yamada, S. Okamoto, Yu-ki Tanabe, 2018, Organometallics.

Cobalt-catalyzed benzyl–alkynyl coupling

S. Okamoto, Naoko Saino, Taku Kamachi, 2006 .

Folded H-Stacking Polymers by Conformational Control with 2-Substituted Trimethylene Tethers

S. Okamoto, Yuka Nakamura, J. Watanabe, 2010 .

Quick Access to Diverse Polymerizable Molecules (a Monomer Library) by Catalytic [2 + 2 + 2] Cycloaddition Reactions of Functionalized Alkynes

Y. Sugiyama, S. Okamoto, A. Goswami, 2010 .

Synthesis and pharmacological activities of 13-dehydro derivatives of primary prostaglandins.

S. Okamoto, N. Ono, F. Sato, 1998, Bioorganic & medicinal chemistry letters.

An efficient synthesis of optically active (2R,3R)-2-methyl-3-[(1R)-1-methylprop-2-enyl]cyclopentanone, a useful chiral building block for synthesis of vitamin D and steroids

Yongcheng Song, S. Okamoto, F. Sato, 2003 .

6-Halo-2-pyridone as an efficient organocatalyst for ester aminolysis

S. Okamoto, Yusuke Watanabe, Takeshi Yamada, 2021, RSC advances.

Preparation of 2-hydroxy A-ring precursors for synthesis of vitamin D3 analogues from lyxose

S. Okamoto, N. Hayashi, Kouta Ibe, 2015 .

Synthesis and vitamin D receptor affinity of 16-oxa vitamin D3 analogues.

Takeshi Yamada, S. Okamoto, Kouta Ibe, 2019, Organic & biomolecular chemistry.

Synthetic Reactions Using Low-Valent Titanium Reagents Derived from Ti(OR)4 or CpTiX3 (X: O-iPr or Cl) in the Presence of Me3SiCl and Mg

S. Okamoto, 2016 .

Silica‐Supported Silver as a Green and Sustainable Catalyst for the [3+2]‐Cycloaddition Reaction of Azomethine Ylides with 2′‐Hydroxychalcone Derivatives

S. Okamoto, Suchithra Madhavan, 2018 .

Generation of a Low‐Valent Titanium Species from Titanatrane and its Catalytic Reactions: Radical Ring Opening of Oxetanes

S. Okamoto, K. Miyashita, Noriaki Shoji, 2013 .

An efficient approach to optically active benzoprostacyclins by a two-component coupling process

S. Okamoto, F. Sato, Y. Yoshida, 1995 .

From the Development of Catalysts for Alkyne and Alkyne–Nitrile [2+2+2] Cycloaddition Reactions to Their Use in Polymerization Reactions

Y. Sugiyama, S. Okamoto, 2013, Synlett.

Nickel-catalysed cycloaddition oligomerisation of 1,6-diynes to medium-size cyclic polyenes

S. Okamoto, Takeshi Yamada, Yuhsaku Okabe, 2022, Polymer Chemistry.