Y. Ichikawa

发表

A novel design of roof-shaped anthracene-fused chiral prolines as organocatalysts for asymmetric Mannich reactions

M. Uddin, M. Shiro, H. Kotsuki, 2006 .

Synthesis of (−)-(5R,6S)-6-acetoxyhexadecanolide based on l-proline-catalyzed asymmetric aldol reactions

H. Kotsuki, Y. Sekiguchi, Y. Ichikawa, 2006 .

Synthesis of a marine polyether toxin, okadaic acid [1] — strategy and synthesis of segment a

M. Isobe, D. Bai, T. Goto, 1987 .

Development of new DMAP-related organocatalysts for use in the Michael addition reaction of β-ketoesters in water

K. Nakano, H. Kotsuki, Shigeru Watanabe, 2009 .

Cross‐reactivity of highly purified okadaic acid (OA), synthetic, spiroketal east sphere of OA and ciguatoxin

T. Yasumoto, M. Isobe, Y. Ichikawa, 1992, Journal of clinical laboratory analysis.

Protecting group-free method for synthesis of N-glycosyl carbamates and an assessment of the anomeric effect of nitrogen in the carbamate group.

T. Masuda, Kumi Yoshida, Rika Ochi, 2021, Carbohydrate research.

A new environmentally friendly method for the Baeyer–Villiger oxidation of cyclobutanones catalyzed by thioureas using H2O2 as an oxidant

K. Nakano, H. Kotsuki, Y. Ichikawa, 2012 .

A new approach to the neoglycopeptides: synthesis of urea- and carbamate-tethered N-acetyl-D-glucosamine amino acid conjugates.

K. Nakano, H. Kotsuki, Y. Ichikawa, 2006, Organic letters.

Stereospecific synthesis of urea-tethered neoglycoconjugates starting from glucopyranosyl carbamates

M. Isobe, Y. Ichikawa, T. Nishiyama, 2004 .

Stereospecific Synthesis of the a- and - d -Glucopyranosyl Ureas

M. Isobe, Y. Ichikawa, T. Nishiyama, 2001 .

Stereospecific Synthesis of the α- and β-d-Glucopyranosyl Ureas

M. Isobe, Y. Ichikawa, T. Nishiyama, 2001 .

A Biomimetic Approach to the Synthesis of the Core Structure of the Marine Sponge Terpene Halichonadin G

T. Masuda, Kenta Saito, H. Kotsuki, 2013 .

Anomeric Effect of the Nitrogen Atom in the Isocyano and Urea Groups

H. Kotsuki, Y. Ichikawa, Hitomi Watanabe, 2010 .

Aminohydroxyacetone synthons: versatile intermediates for the organocatalytic asymmetric aldol reaction.

H. Kotsuki, Y. Ichikawa, Hideaki Ikishima, 2012, Organic & biomolecular chemistry.

Total synthesis of (+)-prelog-djerassi lactonic acid

M. Isobe, T. Goto, Y. Ichikawa, 1982 .

Synthesis of (+)-conagenin.

M. Isobe, H. Kotsuki, Y. Ichikawa, 2005, The Journal of organic chemistry.

Stereocontrolled route to vicinal diamines by [3.3] sigmatropic rearrangement of allyl cyanate: asymmetric synthesis of anti-(2R,3R)- and syn-(2R,3S)-2,3-diaminobutanoic acids.

Takashi Ito, M. Isobe, H. Kotsuki, 2006, Organic letters.

Evolution, Development and Personal Experience in Studies of the Allyl Cyanate-to-Isocyanate Rearrangement

Y. Ichikawa, 2007 .

Stereoselective allyl amine synthesis via enantioselective addition of diethylzinc and sigmatropic rearrangement; Synthesis of lentiginosine

Takashi Ito, M. Isobe, Y. Ichikawa, 2003 .

Efficient Brønsted acid-catalyzed aza-Michael reaction of amides and ureas with α,β-unsaturated enones under high-pressure conditions

Tomohiro Kobayashi, H. Kotsuki, Y. Ichikawa, 2009 .

Aminohydroxyacetone Synthone: Versatile Intermediates for the Organocatalytic Asymmetric Aldol Reaction.

H. Kotsuki, Y. Ichikawa, Hideaki Ikishima, 2012 .

Synthesis of (-)-agelastatin A by [3.3] sigmatropic rearrangement of allyl cyanate.

H. Kotsuki, Y. Ichikawa, Keiji Nakano, 2007, Organic letters.

Synthesis of a marine polyether toxin, okadaic acid (3) — synthesis of segment c

M. Isobe, T. Goto, Y. Ichikawa, 1987 .

Synthesis of C-glycosyl compounds from 3,4,6-tri-O-acetyl-1,5-anhydro-D-arabino-hex-1-enitol and allyltrimethylsilane and bis(trimethylsilyl)acetylene

M. Isobe, T. Goto, Y. Ichikawa, 1987 .

Synthesis of glycocinnasperimicin D.

Y. Kusumoto, M. Isobe, H. Kotsuki, 2010, Chemistry.

SYNTHESIS OF OKADAIC ACID-TAUTOMYCIN HYBRID

M. Isobe, K. Tsuboi, Y. Ichikawa, 1997 .

Synthetic studies on tautomycin synthesis of Segment B

M. Ubukata, K. Isono, M. Isobe, 1997 .

Synthesis of maytansinoid. A general approach via heteroconjugate addition strategy and the total synthesis of (.+-.)-maysine and (.+-.)-N-methylmaysenine

M. Isobe, M. Kitamura, T. Goto, 1984 .

SYNTHESIS OF CONAGENIN AND α-METHYLSERINE. A REVIEW

H. Kotsuki, Y. Ichikawa, Keiji Nakano, 2008 .

ORGANOCATALYTIC ASYMMETRIC DIELS-ALDER REACTION OF FURAN UNDER HIGH PRESSURE

H. Kotsuki, Y. Ichikawa, Keiji Nakano, 2010 .

Synthetic studies toward marine toxic polyethers (2) synthesis of the B-segment of okadaic acid and coupling with the C-segment

M. Isobe, T. Goto, Y. Ichikawa, 1984 .

Synthetic studies toward marine toxic polyethers (1) a stereocontrolled synthesis of the C-segnent of okadaic acid

M. Isobe, T. Goto, Y. Ichikawa, 1984 .

The Reactions of α-Alkoxy-Substituted Styrenes with Dimethyl Acetylenedicarboxylate and Dimethyl Fumarate Novel Adducts in the Reaction with Dimethyl Fumarate

Tadashi Yamaguchi, H. Kotsuki, M. Ochi, 1994 .

Synthesis of manzacidin A and C: efficient construction of quaternary carbon stereocenters bearing nitrogen substituents.

Mitsuhiro Nakamura, T. Masuda, H. Kotsuki, 2012, Organic & biomolecular chemistry.

Total synthesis of exigurin: the Ugi reaction in a hypothetical biosynthesis of natural products.

T. Masuda, S. Hosokawa, Y. Ichikawa, 2020, Organic & biomolecular chemistry.

Asymmetric Michael Addition Reaction of α-Aryl-Substituted Lactams Catalyzed by Chiral Quaternary Ammonium Salts Derived from Cinchona Alkaloids: A New Short Synthesis of (+)-Mesembrine

H. Kotsuki, Y. Ichikawa, Keiji Nakano, 2015, Synlett.

Stereoselective allyl amine synthesis through enantioselective addition of diethylzinc and [1,3]-chirality transfer: synthesis of lentiginosine and polyoxamic acid derivative.

Takashi Ito, M. Isobe, Y. Ichikawa, 2005, Chemistry.

Asymmetric synthesis of (+)-geranyllinaloisocyanide: assignment of absolute stereochemistry.

Mitsuhiro Nakamura, T. Masuda, H. Kotsuki, 2011, Organic letters.

Protecting group free synthesis of urea-linked glycoconjugates: efficient synthesis of β-urea glycosides in aqueous solution.

T. Masuda, H. Kotsuki, Y. Ichikawa, 2014, Organic & biomolecular chemistry.

Synthesis of urea-tethered neoglycoconjugates and pseudooligosaccharides in water.

M. Isobe, Y. Ichikawa, Yohei Matsukawa, 2006, Journal of the American Chemical Society.

Synthesis, Characterization, and Reaction of Crystalline Fischer’s Glucopyranosyl Isocyanate

M. Isobe, Y. Ichikawa, T. Nishiyama, 2004 .

Allyl Cyanate‐To‐Isocyanate Rearrangement: Preparation of tert‐Butyl 3,7‐Dimethylocta‐1,6‐dien‐3‐ylcarbamate

Y. Ichikawa, T. Hasegawa, Noriko Kariya, 2014 .

An Efficient Synthesis of Carbamates by Tin‐Catalyzed Transcarbamoylation Reactions of Primary and Secondary Alcohols.

Shuhei Kusaba, H. Kotsuki, Y. Ichikawa, 2010 .

TOTAL SYNTHESIS OF (+)-TAUTOMYCIN

M. Isobe, A. Naganawa, K. Tsuboi, 1995 .

Synthesis of a marine polyether toxin, okadaic acid [4]p1 -- total synthesis

M. Isobe, D. Bai, T. Goto, 1987 .

Acyclic stereocontrol by heteroconjugate addition—4 : Anti-diastereoselection by a β-chelation effect

M. Isobe, T. Goto, Y. Ichikawa, 1986 .

Synthetic studies toward marine toxic polyethers [5] the total synthesis of okadaic acid

M. Isobe, T. Goto, Y. Ichikawa, 1986 .

Acyclic stereocontrol by heteroconjugate addition — 3 : Diastereoselective synthesis of either syn or anti diastereoisomer

M. Isobe, T. Goto, Y. Ichikawa, 1984 .

Stereocontrolled total synthesis of (-)-maytansinol

M. Isobe, M. Kitamura, T. Goto, 1982 .

SYNTHETIC STUDIES TOWARD MAYTANSINOIDS PREPARATION OF THE OPTICALLY ACTIVE INTERMEDIATES FROM D-MANNOSE

M. Isobe, M. Kitamura, T. Goto, 1981 .

Synthetic studies on tautomycin

M. Isobe, A. Naganawa, Y. Ichikawa, 1994 .

Synthesis of nitrogen-containing unsaturated carbohydrates via an allyl cyanate-to-isocyanate rearrangement

M. Isobe, Y. Ichikawa, C. Kobayashi, 1996 .

Synthetic studies toward marine toxic polyethers (4) synthesis of segment -A of okadaic acid via -selectivity by heteroconjugate addition

M. Isobe, D. Bai, T. Goto, 1985 .

Microwave-assisted and Ln(OTf)3-catalyzed homo-conjugate addition of N-heteroaromatics to activated cyclopropane derivatives

M. Uddin, H. Kotsuki, Y. Ichikawa, 2008 .

Total synthesis of glycocinnasperimicin D.

M. Isobe, Y. Ichikawa, T. Nishiyama, 2005, Angewandte Chemie.

Stereocontrolled synthesis of cytotoxic anhydrosphingosine pachastrissamine by using [3.3] sigmatropic rearrangement of allyl cyanate

T. Masuda, Ken-ichiro Matsunaga, H. Kotsuki, 2008 .

A NEW SYNTHETIC METHOD FOR THE PREPARATION OF AMINO SUGARS THROUGH AN ALLYL CYANATE-TO-ISOCYANATE REARRANGEMENT

M. Isobe, I. Ohtani, Y. Ichikawa, 1997 .

New Synthetic Method for Allylic Isocyanates Through [3,3] Sigmatropic Rearrangement of Allylic Cyanates

Y. Ichikawa, 1991 .

Allyl Cyanate-to-isocyanate Rearrangement for the Synthesis of Quaternary Stereocenter with Nitrogen Substituent

M. Isobe, Y. Ichikawa, E. Yamauchi, 2005, Bioscience, biotechnology, and biochemistry.

A New Synthetic Method for the Preparation of Amino Sugars Through an Allyl Cyanate‐to‐Isocyanate Rearrangement.

M. Isobe, Y. Ichikawa, Minoru Osada, 1997 .

Synthetic studies toward marine toxic polyethers (3) stereocontrol for segment-A1 of okadaic acid by means of oxymercuration and epoxydation

M. Isobe, T. Goto, Y. Ichikawa, 1985 .

Synthesis of Marine Natural Product Agelastatin A

H. Kotsuki, Y. Ichikawa, Tomonori Yamaoka, 2012 .

Synthesis of urea-tethered disaccharides in water.

M. Isobe, H. Kotsuki, Y. Ichikawa, 2006, Chemistry, an Asian journal.

An Efficient Synthesis of Carbamatesby Tin-Catalyzed Transcarbamoylation Reactions of Primary and SecondaryAlcohols

Shuhei Kusaba, H. Kotsuki, Y. Ichikawa, 2010 .

A new practical method for the synthesis of unsymmetrical ureas via high-pressure-promoted condensation of 2,2,2-trichloroethyl carbamates (Troc-carbamates) with amines

H. Kotsuki, Y. Ichikawa, Koji Kumamoto, 2006 .

Asymmetric organocatalytic desymmetrization of 4,4-disubstituted cyclohexadienones at high pressure: a new powerful strategy for the synthesis of highly congested chiral cyclohexenones.

H. Kotsuki, Y. Ichikawa, Keiji Nakano, 2014, Organic & biomolecular chemistry.

Synthesis of β-Glycosyl Formamides Through N-Glycosylation of Unprotected Carbohydrates

T. Masuda, H. Kotsuki, Y. Ichikawa, 2016 .

A new powerful strategy for the organocatalytic asymmetric construction of a quaternary carbon stereogenic center.

H. Kotsuki, Y. Ichikawa, Niiha Sasakura, 2010, Organic letters.

Enantioselective Synthesis of Quaternary Carbon Stereogenic Centers through the Primary Amine‐Catalyzed Michael Addition Reaction of α‐Substituted Cyclic Ketones at High Pressure

H. Kotsuki, Y. Ichikawa, Keiji Nakano, 2015 .

High Pressure Organic Chemistry. Part 40. Enantioselective Synthesis of Quaternary Carbon Stereogenic Centers Through the Primary Amine‐Catalyzed Michael Addition Reaction of α‐Substituted Cyclic Ketones at High Pressure.

H. Kotsuki, Y. Ichikawa, Keiji Nakano, 2015 .

EFFICIENT ORGANOCATALYTIC MICHAEL ADDITION REACTION OF β-KETOESTERS UNDER HIGH PRESSURE

Y. Ichikawa, Keiji Nakano, Maya Moritaka, 2013 .

Highly Efficient Asymmetric Michael Addition Reaction of Malonates to α,β-Unsaturated Ketones Promoted by a Chiral Thiourea/PPY Dual-Catalyst System

H. Kotsuki, Y. Ichikawa, Keiji Nakano, 2012 .

Methyl Phenyl Sulfone

M. Isobe, Y. Ichikawa, 2001 .

A new method for C–C coupling of terminal alkenes via a sulphonylation–alkylation–desulphinylation sequence: synthesis of E- and Z-α-bisabolenes

J. Baldwin, R. Adlington, Y. Ichikawa, 1988 .

Synthesis of a marine polyether toxin, okadaic acid (2) — synthesis of segment b

M. Isobe, T. Goto, Y. Ichikawa, 1987 .

Chirality Transfer from a Chiral Primary Alcohol Equivalent Through Allyl Cyanate-to-Isocyanate Rearrangement: Synthesis of (+)-Geranyllinaloisocyanide

T. Masuda, Y. Ichikawa, Hirofumi Morimoto, 2019, Synthesis.

A BIOMIMETIC APPROACH TO THE SYNTHESIS OF TERPENE-AMINO ACID CONJUGATES : THE UGI REACTION IN THE HYPOTHETICAL BIOSYNTHESIS OF MARINE NATURAL PRODUCTS

T. Masuda, Kenta Saito, H. Kotsuki, 2016 .

Biomimetic Approaches Employing the Ugi Five-Center Four-Component Reaction for Synthesis of the Right-Hand Portion of Halichonadin Q and the Central Part of Halichonadin M

T. Masuda, H. Kotsuki, Y. Ichikawa, 2015, Synthesis.

A Biomimetic Approach to Terpenes Isolated from Marine Sponges: a Ugi Coupling Reaction in a Hypothetical Biosynthesis

Kenta Saito, H. Kotsuki, Y. Ichikawa, 2013, Synlett.

Synthesis of trans-2,6-Piperidinedicarboxamide Using the Ugi Reaction. A Plausible Model for the Biosynthesis of Halichonadin P

Kenji Matsumoto, T. Masuda, H. Kotsuki, 2016 .

Bioinspired Synthesis of the Central Core of Halichonadin H: The Passerini Reaction in a Hypothetical Biosynthesis of Marine Natural Products

T. Masuda, S. Hosokawa, Y. Ichikawa, 2019, Synthesis.

Novel, regioselective allylamine construction; first synthesis of geranyllinaloisocyanide, a diterpene from the marine sponge, Halichondria sp.

M. Isobe, Y. Ichikawa, M. Yamazaki, 1994 .

EFFICIENT AND MILD PROCEDURE FOR THE DECARBOXYLATIVE CYANOMETHYL ESTERIFICATION OF ARYLMALONIC ACIDS USING ClCH2CN/1,8-DIAZABICYCLO〔5.4.0〕UNDEC-7-ENE

H. Kotsuki, Y. Ichikawa, Niiha Sasakura, 2011 .

A Novel Method for the High-Pressure-Promoted Uncatalyzed Aza-Michael Reaction of Nitrogen Heterocycles with Enones in Water

M. Uddin, H. Kotsuki, Y. Ichikawa, 2008 .

SYNTHESIS OF SEGMENT C OF TAUTOMYCIN

Minoru Isobe, Yoshiyasu Ichikawa, M. Isobe, 1995 .

First synthesis of agelasidine A

Y. Ichikawa, 1988 .

Further Development of the Tin-Catalyzed Transcarbamoylation Reaction

Hiroshi Sato, T. Masuda, Rika Ochi, 2020, Synthesis.

Stereocontrolled Synthesis of Nitrogen-Substituted Quaternary Stereogenic Centers: Lessons from a Synthetic Route to the Core Structure of Sphingofungin E

Rika Ochi, Y. Ichikawa, Keisuke Nakanishi, 2023, HETEROCYCLES.

Total synthesis of (+)-blasticidin s.

M. Isobe, Y. Ichikawa, K. Hirata, 2004, Chemistry.

Organocatalytic Friedel–Crafts Benzylation of Heteroaromatic and Aromatic Compounds via an SN1 Pathway

Y. Ichikawa, Keiji Nakano, N. Watanabe, 2013, Synlett.