Abstract
Abstract It was found that trans-aryl-vinyl epoxides could be synthesized with 77–100% conversion from conjugated aldehydes (which could also behave as Michael acceptors and lead to cyclopropanes) and chiral sulfonium salts with ee's ranging from 95 to 100%. When a p-methoxy group was present on the arylsulfonium salt, the epoxide was the sole product whatever the solvent.
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