Yasutaka Ishii

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ChemInform Abstract: New Strategies for Sulfate‐Free Synthesis of Lactams from Cycloalkanes Using NHPI as a Key Catalyst

ChemInform (2009)

Yasutaka Ishii Satoshi Sakaguchi Yasushi Obora

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

10.1002/chin.200916259

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ChemInform Abstract: First Ritter-Type Reaction of Alkylbenzenes Using N-Hydroxyphthalimide as a Key Catalyst.

ChemInform (2002)

Satoshi Sakaguchi Tomotaka Hirabayashi Yasutaka Ishii

Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Alkylbenzenes

Ritter reaction

10.1002/chin.200228085

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ChemInform Abstract: Epoxidation of α,β-Unsaturated Carboxylic Acids with Hydrogen Peroxide by Heteropoly Acids.

ChemInform (1990)

Takahito Oguchi Y. SAKATA Naotoshi Takeuchi Kiyotomi Kaneda Yasutaka Ishii

Abstract The unsaturated aliphatic carboxylic acids (Ia), (Ib), (Id), and (Ie) react with hydrogen peroxide in the presence of heteropoly acids to form the oxiranes (II).

Peroxide

10.1002/chin.199026170

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Baeyer–Villiger Oxidation of Cycloalkanones with In Situ Generated Hydrogen Peroxide from Alcohols and Molecular Oxygen Using NHPI as a Key Catalyst

Bulletin of the Chemical Society of Japan (2009)

Kenichiro Kamae Yasushi Obora Yasutaka Ishii

Abstract One-pot Baeyer–Villiger oxidation of cycloalkanones was successfully achieved by allowing them to react with hydrogen peroxide generated in situ from benzhydrol and molecular oxygen assisted by N-hydroxyphthalimide (NHPI) and 2,2′-azobisisobutyronitrile (AIBN). This method provides an alternative synthetic route to lactones from cycloalkanones using sec-alcohols and molecular oxygen assisted by NHPI.

10.1246/bcsj.82.891

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Citations (19)

ChemInform Abstract: Selective One‐Pot Synthesis of Various Phenols from Diarylethanes.

ChemInform (2008)

Ryota Nakamura Yasushi Obora Yasutaka Ishii

10.1002/chin.200846071

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Development of Novel Aerobic Oxidation Method using N-Hydroxyphthalimide as Catalyst

Journal of Synthetic Organic Chemistry Japan (1999)

Yasutaka Ishii Satoshi Sakaguchi Takahiro Iwahama

Novel methods for the oxidation of alkanes with molecular oxygen using a radical catalyst, N-hydroxyphthalimide (NHPI), have been developed. Thus, a variety of alkanes such as cyclohexane, adamantane and toluene which are very difficult to be oxidized with molecular oxygen by conventional methods could be converted into the corresponding alcohols and/or carbonyl compounds in high yields. The application of the same methodology to adamantane with CO/air led to adamantanecarboxylic acid through radical carbonylation in fair yield. The reaction of benzyl ethers with NO in the presence of NHPI afforded the corresponding aldehydes in good yields. The present method provides a new class of aerobic oxidation which is refered to as radical-catalyzed autoxidation.

Autoxidation

Adamantane

Molecular oxygen

Carbonylation

Cycloalkane

10.5059/yukigoseikyokaishi.57.24

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Citations (7)

ChemInform Abstract: A Novel Synthesis of 1,3-Diol Diesters by the Reaction of Aldehydes with Oxime Esters Catalyzed by Samarium Complex.

ChemInform (1998)

Y. KAWASAKI Daisuke Tashiro Satoshi Sakaguchi Yasutaka Ishii

10.1002/chin.199821078

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New Coupling Reaction of Secondary Amines, Aldehydes, and Alkynes Catalyzed by an Iridium Complex

Organic Letters (2006)

Satoshi Sakaguchi Tomoya Mizuta Yasutaka Ishii

A new reductive coupling reaction of secondary amines, aldehydes, and alkynes using an iridium complex as catalyst has been developed. For example, dibutylamine was allowed to react with butyraldehyde and 1-octyne in 1,4-dioxane at 50 degrees C under the influence of a catalytic amount of [IrCl(cod)](2) to give the corresponding allylamines such as N,N-dibutyl-2-butylideneoctylamine and N,N-2-tributyl-2-octenylamine in excellent yields. [reaction: see text]

Coupling reaction

Primary (astronomy)

10.1021/ol060578z

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Citations (15)

Beckmann Rearrangement of Ketoximes to Lactams by Triphosphazene Catalyst

The Journal of Organic Chemistry (2008)

Masaharu Hashimoto Yasushi Obora Satoshi Sakaguchi Yasutaka Ishii

Triphosphazene, 1,3,5-triazo-2,4,6-triphosphorine-2,2,4,4,6,6-chloride (TAPC), was found to be an efficient catalyst for the Beckmann rearrangement of cyclohexanone oxime and cyclododecanone oxime to ε-caprolactam and laurolactam, which are raw materials of nylon-6 and nylon-12, respectively.

Beckmann rearrangement

Cyclohexanone oxime

Caprolactam

10.1021/jo702277g

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Citations (166)

Catalytic α-hydroxy carbon radical generation and addition. Synthesis of α-hydroxy-γ-lactones from alcohols, α,β-unsaturated esters and dioxygen

Chemical Communications (2000)

Takahiro Iwahama Satoshi Sakaguchi Yasutaka Ishii

A catalytic method for α-hydroxy carbon radical generation from alcohols has been developed and a convenient and synthetically useful approach to α-hydroxy-γ-lactones constructed.

Carbon fibers

10.1039/b000707m

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Citations (44)