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α-Chiral Acetylenes Having an All-Carbon Quaternary Center: Phase Transfer Catalyzed Enantioselective α Alkylation of α-Alkyl-α-alkynyl Esters

✍ Scribed by Takuya Hashimoto; Kazuki Sakata; Keiji Maruoka

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
296 KB
Volume
121
Category
Article
ISSN
0044-8249

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✦ Synopsis

Abstract

Ein mehrphasiger Prozess: Untersuchungen der Titelreaktion ergaben, dass sie als basenvermittelte Isomerisierung zu Allenylester und anschließende phasentransferkatalysierte Alkylierung an der α‐Position des Esters verläuft (siehe Schema).magnified image

📜 SIMILAR VOLUMES

α-Chiral Acetylenes Having an All-Carbon
α-Chiral Acetylenes Having an All-Carbon Quaternary Center: Phase Transfer Catalyzed Enantioselective α Alkylation of α-Alkyl-α-alkynyl Esters
✍ Takuya Hashimoto; Kazuki Sakata; Keiji Maruoka 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 296 KB

## Abstract **Going through the phases**: The title reaction was found to proceed by an initial base‐mediated isomerization to allenyl esters and subsequent phase transfer catalyzed alkylation at the α position of the ester (see scheme).magnified image

New, Chiral Phase Transfer Catalysts for
New, Chiral Phase Transfer Catalysts for Effecting Asymmetric Conjugate Additions of α-Alkyl-α-cyanoacetates to Acetylenic Esters.
✍ Xisheng Wang; Masanori Kitamura; Keiji Maruoka 📂 Article 📅 2007 🏛 John Wiley and Sons ⚖ 29 KB 👁 2 views

## 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, please click on HTML or PDF.