Eiji Tayama

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ChemInform Abstract: Broensted Acid Catalyzed Regioselective aza‐Ferrier Reaction: A Novel Synthetic Method for α‐(N‐Boc‐2‐pyrrolidinyl) Aldehydes.

ChemInform (2009)

Eiji Tayama Seijun Otoyama Wataru Isaka

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.200904099

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Activation and Stabilization of Aldimines by an ortho‐Trifluoromethyl Substituent in Direct Vinylogous Mannich‐Type Reactions.

ChemInform (2004)

Mark Lautens Eiji Tayama Duy Nguyen

Abstract For Abstract see ChemInform Abstract in Full Text.

Aldimine

10.1002/chin.200440083

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ChemInform Abstract: Dramatic Rate Enhancement by Ultrasonic Irradiation in Liquid-Liquid Phase-Transfer Catalytic Reactions.

ChemInform (2001)

Takashi Ooi Eiji Tayama Kanae Doda Mifune Takeuchi Keiji Maruoka

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.

Liquid phase

Liquid liquid

10.1002/chin.200106072

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Remarkable template effect of a Lewis acid receptor in the intramolecular radical cyclization: control of reaction pathway as well as stereochemistry

Tetrahedron (2001)

Takashi Ooi Yasutoshi Hokke Eiji Tayama Keiji Maruoka

Radical cyclization

10.1016/s0040-4020(00)01007-3

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Citations (7)

Copper(II)–acid catalyzed cyclopropanation of 1,3-dienamides by electrophilic activation of α-aryl diazoesters

Tetrahedron Letters (2014)

Eiji Tayama Kouki Horikawa Hajime Iwamoto Eietsu Hasegawa

10.1016/j.tetlet.2014.03.115

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Citations (10)

A facile synthetic method of α-quaternary-β,γ-unsaturated aldehydes via the stereoselective 1,4-elimination and α-regioselective Ferrier reaction

Tetrahedron Letters (2007)

Eiji Tayama R. Hashimoto

Butyllithium

Reaction conditions

10.1016/j.tetlet.2007.09.049

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Citations (13)

ChemInform Abstract: Application of Biphasic Reaction Procedure Using Ferric Chloride Dissolved in an Imidazolium Salt and Benzotrifluoride (FeIm‐BTF Procedure) to Aza‐Prins Cyclization Reaction.

ChemInform (2011)

Eietsu Hasegawa Nohara Hiroi Chika Osawa Eiji Tayama Hajime Iwamoto

Abstract A combination of FeCl 3 and [bmim]FeCl 4 (or [bmim]PF 6 ) promotes the cyclization of homoallylic N‐tosylamine (I) with aldehydes using benzotrifluoride as the solvent.

Prins reaction

10.1002/chin.201113136

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Recent Advances in the Generation of Onium Ylides for Sommelet–Hauser Rearrangements

Synthesis (2022)

Eiji Tayama

Abstract The Sommelet–Hauser rearrangement of X-benzylic onium ylides (X = heteroatom) is an interesting transformation in organic synthesis. This rearrangement proceeds via dearomative [2,3]-sigmatropic rearrangement, followed by aromatization to form a carbon(sp2)–carbon(sp3) bond. Few advances were made in studies performed around 2000 on this rearrangement because of several competitive side reactions and structural limitations. However, studies performed in the last 15 years on the rearrangement have remarkably expanded the substrate scope and synthetic applications. In this review, the utility of the Sommelet–Hauser rearrangement and recent advances for the generation of onium ylides are described. 1 Introduction 2 Base-Induced Rearrangement 3 Transition-Metal-Catalyzed Rearrangement 4 Light-Mediated Rearrangement 5 Aryne-Induced Rearrangement 6 Conclusions and Outlook

Cope rearrangement

Onium

Rearrangement reaction

Pericyclic reaction

Heteroatom

Sulfonium

Carroll rearrangement

10.1055/a-1914-7261

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Citations (3)

ChemInform Abstract: Efficient Synthesis of Aromatic sec‐Amides from Esters: Synthetic Utility of Bislithium Amides.

ChemInform (1999)

Takashi Ooi Eiji Tayama Masao Yamada Keiji Maruoka

10.1002/chin.199935083

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ChemInform Abstract: Remarkable Enhancement Effect of Potassium tert‐Butoxide/THF Solution in Base‐Induced Sommelet—Hauser Rearrangements.

ChemInform (2011)

Eiji Tayama Keisuke Takedachi Hajime Iwamoto Eietsu Hasegawa

Abstract The rearrangement of (benzylammoniomethyl)esters of type (I) under the title conditions affords α‐aryl‐α‐amino acid derivatives (II) and generally only minor amounts of the [1,2] Stevens rearrangement products (III).

Base (topology)

10.1002/chin.201111033

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Citations (0)