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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
48
Category
Article
ISSN
0044-8249

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✦ Synopsis

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

📜 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 **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

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.