Helvetica chimica acta

A Novel Three??Carbon Ring Expansion Sequence Synthesis of Exaltone® and (±)??Muscone

C Fehr

Index: Fehr, Charles Helvetica Chimica Acta, 1983 , vol. 66, # 8 p. 2512 - 2518

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Citation Number: 21

Abstract

Abstract Intramolecular Grignard-type reaction of the bromo lactones 3 and 8 affords the macrocycles 10, 11, 12 and 13, 14, 15, respectively. More efficiently, 10 and 13 are obtained by intramolecular nucleophilic attack of the carbanions derived from the sulfonyl lactones 20

~72%

~74%

~89%

~76%

~69%

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