Abstract

Allyl 2-thienyl sulphide, allyl 3-thienyl sulphide, allyl 2-methyl-3-thienyl sulphide, and crotyl 2-thienyl sulphide undergo a typical thio-Claisen rearrangement, when heated in quinoline. The choice of solvent is crucial. The intermediates have been isolated or trapped as S-benzoyl derivatives and the ring-closure products formed identified.

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