Domino Vilsmeier-Haack/ring closure sequences: A facile synthesis of 3-chlorobenzo[b]thiophene-2-carbaldehydes
Vilsmeier's reagent treatment of substituted diphenacyl sulfides or diphenacyl disulfides has led to the formation of a series of benzfused 3-chlorothiophene-2-carbaldehydes by a Domino Vilsmeier-Haack reaction/ring closure sequence, opening a new route for the synthesis of 3-chlorobenzo[b] thiophene-2-carbaldehydes and their benzfused analogues. A plausible mechanism has been proposed.
Paul, Nidhin,Muthusubramanian, Shanmugam
scheme or table
p. 3743 - 3746
(2011/08/06)
The Synthesis of All of the Monomethyl Isomers of Benzonaphthothiophene
All isomers of the monomethylbenzonaphthothiophenes were synthesized by photocyclization of 2-styrylbenzothiophenes which were prepared by the Wadsworth-Emmons reaction or the Wittig reaction.
Tominaga, Yoshinori,Pratap, Ram,Castle, Raymond N.,Lee, Milton L.
p. 871 - 877
(2007/10/02)
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