A direct synthesis of olefins by reaction of carbonyl compounds with lithio derivatives of 2-[alkyl- or (2′-alkenyl)- or benzyl-sulfonyl]-benzothiazoles.
作者:Jean Bernard Baudin、Georges Hareau、Sylvestre A. Julia、Odile Ruel
DOI:10.1016/s0040-4039(00)92037-9
日期:1991.2
During the title reaction, the lithium alkoxides formed as intermediates undergo an intramolecular addition to the neighboring CN group followed an S to 0 benzothiazole transfer and simultaneous extrustion of sulfur dioxide and ejection of 2(3H)-benzothiazolone anion.
Direct Synthesis of Thioethers from Carboxylates and Thiols Catalyzed by FeCl<sub>3</sub>
作者:Kunuru Venkatesham、Chitturi Bhujanga Rao、Chanti Babu Dokuburra、Richard A. Bunce、Yenamandra Venkateswarlu
DOI:10.1021/acs.joc.5b02143
日期:2015.11.20
A new and efficient method has been developed for the synthesis of thioethers from carboxylates and thiols. The reaction proceeds via a Fe(III)-catalyzed direct displacement of carboxylates from benzylic or allylic esters by heterocyclic thiols. Short reaction times, good to excellent yields of products, and few side reactions are the significant features of the new protocol.