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Scientific article
English

Transition-Metal-Catalyzed Carbenoid Reactions of Sulfonium Ylides

Published inHelvetica Chimica Acta, vol. 82, no. 6, p. 935-945
Publication date1999
Abstract

Olefins undergo cyclopropanation with diphenylsulfonium (ethoxycarbonyl)methylide (=diphenylsulfonium 2‐ethoxy‐2‐oxoethylide; 3a) in the presence of chiral CuI or RhII catalysts. trans/cis Ratios and ee's of the cyclopropanes 6 obtained with this ylide in the presence of a chiral CuI catalyst 7 are identical with those obtained with ethyl diazoacetate (4). In the case of catalysis with RhII, the trans/cis ratios of the cyclopropanes as well as the enantioselectivity change slightly upon going from the ylide 3a to diazoacetate 4.

Citation (ISO format)
MULLER, Paul et al. Transition-Metal-Catalyzed Carbenoid Reactions of Sulfonium Ylides. In: Helvetica Chimica Acta, 1999, vol. 82, n° 6, p. 935–945. doi: 10.1002/(SICI)1522-2675(19990609)82:6<935::AID-HLCA935>3.0.CO;2-X
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ISSN of the journal0018-019X
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