Thiophen derivatives. Part XVI. The Vilsmeier–Haack reaction with 3- and 4-methoxybenzo[b]thiophen
- 1 January 1967
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society C: Organic
- p. 779-780
- https://doi.org/10.1039/j39670000779
Abstract
The Vilsmeier–Haack formylation of 3-methoxybenzo[b]thiophen at moderate temperature leads to 2-formyl-3-methoxybenzo[b]thiophen, and under more drastic conditions, to 3-chloro-2-formylbenzo[b]thiophen. 4-Methoxybenzo[b]thiophen undergoes formylation in the benzene ring, to give 7-formyl-4-methoxybenzo[b]thiophen.Keywords
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