[reaction: see text] A novel synthesis of allyl sulfoxides has been developed. Primary alpha-lithiosulfinyl carbanions react with group6Fischercarbenecomplexes to give allyl sulfoxides as products. The Fischercarbenecomplex experiments involve a 1,2-addition of two molecules of sulfinyl carbanion to give an intermediate that, after a beta-elimination, furnishes the mentioned product.