S. Ohta

发表

Synthetic Studies on Lycoricidine and Related Compounds. II. Total Synthesis of (±)-Lycoricidine

S. Ohta, S. Kimoto, 1976 .

I. Kawasaki, M. Yamashita, S. Ohta, 1996 .

Adsorption of Polar Volatile Organic Compounds by a Crystalline Network Structure Based on a Bis(benzimidazole)NiCl2 Complex

M. Kurihara, M. Okazaki, S. Ohta, 2020 .

Impact of ligands and media on the structure and properties of biological and biomimetic iron-sulfur clusters

Y. Ohki, S. Ohta, 2017 .

Total synthesis of topsentin, antiviral and antitumor bis(indolyl)imidazole

I. Kawasaki, M. Yamashita, S. Ohta, 1998 .

Total Synthesis of Nortopsentins A-D, Marine Alkaloids

I. Kawasaki, M. Yamashita, S. Ohta, 1996 .

Solid-State Fluorescence of Tryptanthrin Analogs

S. Ito, S. Ohta, J. Kawakami, 2021, Transactions of the Materials Research Society of Japan.

A recyclable catalyst for asymmetric transfer hydrogenation with a formic acid-triethylamine mixture in ionic liquid.

I. Kawasaki, M. Yamashita, S. Ohta, 2005, Chemical communications.

Studies on interactions between functional foods or dietary supplements and medicines. I. Effects of Ginkgo biloba leaf extract on the pharmacokinetics of diltiazem in rats.

M. Yamashita, N. Ohnishi, T. Yokoyama, 2003, Biological & pharmaceutical bulletin.

Preparation of 2-, 3-, 4- and 7-(2-alkylcarbamoyl-1-alkylvinyl)benzo[b]furans and their BLT1 and/or BLT2 inhibitory activities.

J. Kunitomo, Y. Kawamura, T. Yokomizo, 2008, Organic & biomolecular chemistry.

Synthesis, structures, and electronic properties of [8Fe-7S] cluster complexes modeling the nitrogenase P-cluster.

N. Tokitoh, T. Sasamori, Motosuke Imada, 2009, Journal of the American Chemical Society.

Nitrogenase: Metal Cluster Models

S. Ohta, 2019, Encyclopedia of Inorganic and Bioinorganic Chemistry.

A nitrogenase cluster model [Fe8S6O] with an oxygen unsymmetrically bridging two proto-Fe4S3 cubes: relevancy to the substrate binding mode of the FeMo cofactor.

Y. Ohki, K. Tatsumi, S. Ohta, 2012, Inorganic chemistry.

Preparation of 2- and 4-(2-alkylcarbamoyl-1-methylvinyl)-7-alkyloxybenzo[b]furans having potent antagonistic activity against human leukotriene B4 BLT1 and/or BLT2 receptors.

J. Kunitomo, Takao Shimizu, S. Kohno, 2004, Organic & biomolecular chemistry.

Preparation of benzo[b]furans having five-membered heterocycles at the 2-position and 2-(4-Alkylcarbamoylbuta-1,3-dienyl)benzo[b]furans, and their cysteinyl leukotriene receptor (cysLT1, cysLT2) inhibitory activity.

I. Kawasaki, Y. Sakata, T. Ohishi, 2012, Chemical & pharmaceutical bulletin.

Oxido-bridged di-, tri-, and tetra-nuclear iron complexes bearing bis(trimethylsilyl)amide and thiolate ligands.

Y. Ohki, K. Tatsumi, S. Ohta, 2012, Inorganic chemistry.

Bio-Inspired Iron and Nickel Complexes: Monomeric Iron(II) Complexes Having Two Sterically Hindered Arylthiolates

G. Girolami, T. Rauchfuss, Y. Ohki, 2010 .

Serial double nucleophilic addition of amines to the imidazole nucleus

I. Kawasaki, M. Yamashita, S. Ohta, 2000 .

A General Convenient One-Pot Procedure for the Conversion of Carboxylic Acids into Their t-Butyl Esters which is also Applicable to Aliphatic Carboxylic Acids.

S. Ohta, M. Aono, Akihiro Shimabayashi, 1982 .

Double nucleophilic reaction of amines to the imidazole nucleus and selective synthesis of 5-aminoimidazoles

I. Kawasaki, M. Yamashita, S. Ohta, 2004 .

Novel nucleophilic C ? C bond‐forming tele‐reaction of imidazole ring

I. Kawasaki, M. Yamashita, S. Ohta, 2004 .

A New Synthetic Route to β-Hydroxythioethers from Carbonyl Compounds Using Samarium(II) Diiodide (SmI2)

I. Kawasaki, T. Ohhara, M. Yamashita, 1993 .

Synthesis of 3-substituted isocoumarins and related natural products

I. Kawasaki, M. Yamashita, S. Ohta, 1993 .

Synthesis of 3-substituted isocoumarins and their inhibitory effects on degranulation of RBL-2H3 cells induced by antigen.

I. Kawasaki, H. Matsuda, M. Yoshikawa, 2008, Chemical & pharmaceutical bulletin.

Synthesis of a regio-isomer of kealiiquinone, a marine benzimidazole alkaloid

I. Kawasaki, M. Yamashita, Naoki Tsuno, 2001 .

Synthesis of Carbonyl Compounds via Biogenetic-Type Transamination Reaction

S. Ohta, M. Okamoto, 1982 .

Synthesis and Structure of a Bis(indolyl)-Coordinated Titanium Diamido Complex, and Its Catalytic Applications in the Intermolecular Hydroamination of Alkynes

R. Miyamoto, M. Okazaki, S. Ohta, 2018, Bulletin of the Chemical Society of Japan.

Preparation of 3-acetoacetylaminobenzo[b]furan derivatives with cysteinyl leukotriene receptor 2 antagonistic activity.

J. Kunitomo, S. Kohno, M. Yamashita, 2003, Organic & biomolecular chemistry.

Synthesis, Structures, and Solution Dynamics of Titanium and Zirconium Complexes Carrying a Bis(indolyl) and Two Diethylamido Ligands.

R. Miyamoto, M. Okazaki, S. Ohta, 2019, Inorganic chemistry.

Homonuclear diels-alder dimerization of 5-ethenyl-2-phenylsulfanyl-1H-imidazoles and its application to synthesis of 12,12'-dimethylageliferin

I. Kawasaki, M. Yamashita, S. Ohta, 2006 .

Preparation of novel (Z)-4-ylidenebenzo[b]furo[3,2-d][1,3]oxazines and their biological activity

R. Fukuyama, H. Nakamuta, M. Koida, 2009, Bioorganic & Medicinal Chemistry.

Synthesis of 3-Substituted Isocoumarins and Related Natural Products.

I. Kawasaki, M. Yamashita, S. Ohta, 1995 .

One-Step Synthesis of 1, 2, 3, 4-Tetrahydrobenzo[g]quinazoline-5, 10-dione Derivatives from Vitamin K3

I. Kawasaki, M. Yamashita, S. Ohta, 1994 .

Synthetic approaches to 3-amino-1,4-naphthoquinone-2-carboxylic acid derivatives and photochemical synthesis of novel 1,4,5,10-tetrahydro-5,10-dioxo-2H-naphth[2,3-d][1,3]oxazine derivatives.

I. Kawasaki, S. Ohta, H. Yoshikawa, 1994, Chemical & pharmaceutical bulletin.

Synthesis of 3‐Substituted Isocoumarins and Their Inhibitory Effects on Degranulation of RBL‐2H3 Cells Induced by Antigen.

I. Kawasaki, H. Matsuda, M. Yoshikawa, 2009 .

Synthesis of t-butyl 3-oxoalkanoates by acylation of t-butyl lithioacetate with alkyl carboxylates

S. Hayakawa, S. Ohta, Akihiro Shimabayashi, 1985 .

A novel TFA-mediated cyclo-dimerization of 1-substituted 3-alkenylindole derivatives to cyclopent[b]indoles

I. Kawasaki, M. Yamashita, S. Ohta, 2005 .

Novel cyclo-dimerization of 1-tert-butoxycarbonyl-3-alkenylindole derivatives

I. Kawasaki, Miwa Kawai, M. Yamashita, 2005 .

A novel tandem reaction of 3-substituted coumarins with two equivalents of dimethylsulfoxonium ylide to 2-substituted cyclopenta[b]benzofuran-3-ol derivatives

I. Kawasaki, M. Yamashita, T. Kawajiri, 2002 .

Ethylene and propylene polymerization by bis(indolyl)-coordinated titanium dichlorido complexes activated by modified methylaluminoxane

M. Okazaki, S. Ohta, Tomoyuki Toda, 2021, Polymer Journal.

Ethylene polymerization and ethylene/1-octene copolymerization with a titanium complex supported by a bis(indolyl) ligand

M. Okazaki, S. Ohta, Tomoyuki Toda, 2018, Polymer Journal.

Synthesis of (±)-8-deisopropyladunctin B.

I. Kawasaki, S. Yamaguchi, K. Arimitsu, 2012, Chemical & pharmaceutical bulletin.

Discrepancy of the spectral data between adunctin E and the synthetic one

I. Kawasaki, M. Yamashita, S. Ohta, 2007 .

HIGHLY EFFECTIVE PROCEDURE FOR INTRODUCTION OF AMINO GROUP INTO THE 2-POSITION OF IMIDAZOLE RING

I. Kawasaki, Y. Yoneda, M. Yamashita, 1996 .

Novel Diels–Alder-type dimerization of 5-ethenyl-2-phenylsulfanyl-1H-imidazoles and its application to biomimetic synthesis of 12,12′-dimethylageliferin

I. Kawasaki, Fumiya Nikaido, M. Yamashita, 2002 .

Stereoselective synthesis of 3-alkylideneoxindoles via palladium-catalyzed domino reactions.

Y. Takemoto, M. Yamashita, S. Ohta, 2005, The Journal of organic chemistry.

TOTAL SYNTHESIS OF (RS)- AND (R)-3-ALKANOYL-5-HYDROXYMETHYLTETRONIC ACID HOMOLOGUES, HIV-1 PROTEASE INHIBITORY NATURAL PRODUCTS

M. Gotoh, I. Kawasaki, M. Yamashita, 1998 .

Novel stereoconvergent transformation of 1,2a-disubstituted 1,2,2a,8b-tetrahydro-3H-benzo[b]cyclobuta[d]pyran-3-ones to 1,3-disubstituted 1,2,4a,9b-tetrahydrodibenzofuran-4-ols and its application to the second-generation synthesis of (+/-)-linderol A.

I. Kawasaki, T. Inaba, M. Yamashita, 2005, Organic & biomolecular chemistry.

Syntheses of 3-acetoacetylaminobenzo[b]furan derivatives having cysteinyl leukotriene 2 receptor antagonistic activity.

J. Kunitomo, S. Kohno, M. Yamashita, 2004, Organic & biomolecular chemistry.

Syntheses of a,b-Unsaturated Ketones Starting from Vinylic and Allylic Grignard Reagents via 2-Imidazolylmethanol Intermediates

S. Hayakawa, S. Ohta, M. Okamoto, 1988 .

Synthesis and application of imidazole derivatives: synthesis of (1-methyl-1H-imidazol-2-yl)methanol derivatives and conversion into carbonyl compounds

S. Hayakawa, S. Ohta, K. Nishimura, 1987 .

New access to 1,3-dialkyl-2,3-dihydro-2-imino-1H-imidazoles and their application to the first total synthesis of naamine B, a marine 2,3-dihydro-2-imino-1,3-dimethyl-1H-imidazole alkaloid

I. Kawasaki, M. Yamashita, S. Ohta, 2001 .

Synthetic Studies on Lycoricidine and Related Compounds. I. Synthesis of 4aH-r, 2H-cis, 2-Hydroxy-8, 9-methylenedioxy-2, 3, 4, 4a-tetrahydro-6 (5H)-phenanthridone

S. Ohta, S. Kimoto, 1976 .

Total synthesis of (±)-lycoricidine

S. Ohta, S. Kimoto, 1975 .

Synthesis and characterization of a practically better DEPMPO-type spin trap, 5-(2,2-dimethyl-1,3-propoxy cyclophosphoryl)-5-methyl-1-pyrroline N-oxide (CYPMPO)

O. Inanami, Y. Kotake, K. Makino, 2006, Free radical research.

Stereoselective dimerization of α-keto amides using samarium diiodide

I. Kawasaki, M. Yamashita, S. Ohta, 1996 .

Total synthesis of kealiiquinone, an imidazole

I. Kawasaki, M. Yamashita, S. Ohta, 1995 .

Studies on the syntheses of condensed indole-4,7-diones. II. Synthesis of pyrrolo[1,2-a]indole-5,8-dione derivatives.

S. Ohta, M. Okamoto, 1980 .

Synthesis and characterization of heteroleptic iron(II) thiolate complexes with weak iron–arene interactions

Y. Ohki, K. Tatsumi, S. Ohta, 2007 .

Transformation of Tertiary Amines at a Cationic [CCH] Subunit Stabilized by Coordination with a Tetrairon Core

R. Funada, M. Okazaki, S. Ohta, 2018 .

Activation of Isocyanides and Hydrosilanes by a Cationic [CCH] Subunit in a Tetrairon–Tetracarbon Cluster

M. Okazaki, S. Ohta, Wataru Taniwaki, 2016 .

Use of β-Ketocarboxylic Acids for Syntheses of 6-Substituted 4-Hydroxy-2-pyrones and Acyclic β-Diketones

S. Ohta, M. Okamoto, A. Tsujimura, 1981 .

Functional masking of carbonyl group by 1-methyl-1H-imidazol-2-YL moiety

S. Hayakawa, S. Ohta, K. Nishimura, 1984 .

A total synthesis of grifolin.

N. Ohashi, S. Ohta, M. Okamoto, 1988, Chemical & pharmaceutical bulletin.

Generation of an active acyl species from stable 1-methyl-2-acyl-1h-imidazoles

S. Hayakawa, S. Ohta, M. Okamoto, 1985 .

New Applications of 1-Acylimidazoles in Organic Synthesis

S. Ohta, M. Okamoto, 1983 .

A novel and versatile separation method for aldehydes.

S. Ohta, M. Okamoto, 1980 .

Alkylation and Acylation of the 1, 2, 3-Triazole Ring

I. Kawasaki, S. Yamaguchi, T. Uemura, 1997 .

Synthesis and biological activities of novel furo[2,3,4-jk][2]benzazepin-4(3H)-one derivatives.

J. Kunitomo, T. Yokomizo, T. Ohishi, 2007, Organic & biomolecular chemistry.

Reaction of Terminal Oxiranes With Arenesulfonic Acid

S. Ohta, K. Ogawa, M. Okamoto, 1987 .

Reaction of Terminal Oxiranes with Arenesulfonic Acid.

S. Ohta, K. Ogawa, M. Okamoto, 1987 .

Successive diarylation at the carbon positions (2/4 and 2/5) of 1H-imidazole and its application to the total synthesis of nortopsentin D

M. Yamashita, S. Ohta, Ikuo Kaswasaki, 1994 .

Introduction of Alkenyl Group Bearing an Electron-withdrawing Group to the 5-Position of Imidazole Ring by Heck Reaction

I. Kawasaki, M. Yamashita, Mihoko Oda, 1998 .

Introduction of Alkenyl Group Bearing an Electron-Withdrawing Group to the 5-Position of Imidazole Ring by Heck Reaction.

I. Kawasaki, M. Yamashita, Mihoko Oda, 1999 .

1-methyl-3-trimethylsilylparabanic acid as an effective reagent for the preparation of N-substituted (1-methyl-2,5-dioxo-1,2,5H-imidazolin-4-yl)-amines and its application to the total synthesis of isonaamidines A and C, antitumor imidazole alkaloids

I. Kawasaki, M. Yamashita, S. Ohta, 2003 .

Total synthesis of naamine C and pyronaamidine, antitumor marine imidazole alkaloids

I. Kawasaki, M. Yamashita, S. Ohta, 2002 .

Total Syntheses of Naamine A and Naamidine A, Marine Imidazole Alkaloids

I. Kawasaki, M. Yamashita, Naoki Tsuno, 2000 .

Total Synthesis of Kealiiquinone, an Imidazole Marine Alkaloid

I. Kawasaki, M. Yamashita, S. Ohta, 1995 .

Introduction of Carbogenic Substituent into the 4-Position of 1-Methyl-1H-imidazole

I. Kawasaki, M. Yamashita, S. Ohta, 1994 .

Preparation of chiral ligands connected with quaternary ammonium group for recyclable catalytic asymmetric transfer hydrogenation in ionic liquid.

I. Kawasaki, M. Yamashita, S. Ohta, 2015, Chemical and pharmaceutical bulletin.

A novel oxazine ring closure reaction affording (Z)-((E)-2-styrylbenzo[b]furo[3,2-d][1,3]oxazin-4-ylideno)acetaldehydes and their anti-osteoclastic bone resorption activity.

J. Kunitomo, R. Fukuyama, H. Nakamuta, 2006, Bioorganic & medicinal chemistry letters.

Synthesis of Enol Carbonates from a Reaction of Silyl Enolates with 1H-Imidazolylurethane

I. Kawasaki, M. Yamashita, S. Ohta, 1995 .

Reductive Dimerization of Cyclopropane-1,1-dicarboxylic Esters Using Samarium(II) Diiodide (SmI2)

I. Kawasaki, T. Ohhara, M. Yamashita, 1996 .

Ring opening of cyclopropanecarboxylates using samarium(II) diiodide (SmI2)-HMPA-THF system

I. Kawasaki, T. Ohhara, M. Yamashita, 1995 .

Determination of the Absolute Configuration and the First Total Synthesis of (-)- and (+)-Linderol A.

I. Kawasaki, M. Yamashita, S. Ohta, 2004 .

A novel transformation of 1-exo-substituted 2a-aroyl-1,2,2a,8b-tetrahydro-3H-benzo[b]cyclobuta[d]pyran-3-ones with sulfoxonium ylide to highly strained 2a-(1-arylethenyl)-1,2,2a,7b-tetrahydrocyclobuta[b]benzofurans

I. Kawasaki, T. Inaba, M. Yamashita, 2008 .

First total synthesis of (+/-)-Linderol A, a tricyclic hexahydrodibenzofuran constituent of Lindera umbellata bark, with potent inhibitory activity on melanin biosynthesis of cultured B-16 melanoma cells.

I. Kawasaki, M. Yamashita, S. Ohta, 2003, The Journal of organic chemistry.

The first total synthesis of (+/-)-linderol A, a tricyclic hexahydrodibenzofuran constituent of Lindera umbellata bark, with potent inhibitory activity on melanin biosynthesis of cultured B-16 melanoma cells.

I. Kawasaki, M. Yamashita, S. Ohta, 2001, Organic letters.