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Issue 38, 2014
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P4S10 and Na2S-mediated novel annulation routes to c-fused thiophenes

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Abstract

Two efficient hetero-annulation protocols have been developed for the synthesis of stable substituted c-fused thiophene derivatives with moderate to high yield. 3-(2-formyl-phenyl)-acrylic acid esters afforded benzo[c]thiophenes in the presence of phosphorus pentasulfide in refluxing benzene while 3-(2-formyl-cycloalkenyl)α,β-unsaturated esters resulted in the formation of c-fused thiophene derivatives when reacted with sodium sulfide in refluxing tetrahydrofuran.

Graphical abstract: P4S10 and Na2S-mediated novel annulation routes to c-fused thiophenes

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Supplementary files

Article information


Submitted
25 Feb 2014
Accepted
11 Apr 2014
First published
01 May 2014

RSC Adv., 2014,4, 19932-19938
Article type
Paper

P4S10 and Na2S-mediated novel annulation routes to c-fused thiophenes

N. Yasmin, M. Ghosh and J. K. Ray, RSC Adv., 2014, 4, 19932
DOI: 10.1039/C4RA01639D

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