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Comparison of betaine andl-stachydrine as phase-transfer catalysts in Michael addition and Darzens reaction

✍ Scribed by E. Veverková; R. Droppová; Š. Toma

Book ID: 111490988
Publisher: Versita
Year: 2006
Tongue: English
Weight: 205 KB
Volume: 60
Category: Article
ISSN: 0366-6352
DOI: 10.2478/s11696-006-0061-5

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✦ Synopsis

Abstract

Betaine and l-stachydrine have been tested as phase-transfer catalysts in Michael and Darzens reactions. The catalytic effect of l-stachydrine was found comparable to that of betaine in Michael addition and even higher when considering Darzens reaction. The desired products have been obtained in higher yields in solid-liquid system than under liquid-liquid bi-phase conditions. The influence of microwave irradiation and ultrasound on the reaction rate has been studied.

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