Pharmacologically active benzo [b] thiophen derivatives. Part VI. 4-and 6-Halogeno-derivatives of N-2-chloroethyl-N-ethyl-3-aminomethylbenzo [b] thiophen …

NB Chapman, K Clarke, SN Sawhney

Index: Chapman,N.B. et al. Journal of the Chemical Society [Section] C: Organic, 1968 , p. 2747 - 2751

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Abstract

Cyclisation of (m-chlorophenylthio) acetone in hot polyphosphoric acid gave a mixture of 4- chloro-and 6-chloro-3-methylbenzo [b] thiophen (7: 4), and of (m-bromophenylthio) acetone a mixture of 4-bromo-and 6-bromo-3-methylbenzo [b] thiophen (1: 3). These products were identified by the unambiguous synthesis of both 4-and 6-chloro-3-methylbenzo [b] thiophen, and of 4-bromo-3-methylbenzo [b] thiophen. Bromination of the substituted 3-methylbenzo ...