Thiophene analogues of carcinogenic polycyclic hydrocarbons. Elbs pyrolysis of various aroylmethylbenzo [b] thiophenes

A Croisy, J Mispelter, JM Lhoste…

Index: Croisy; Mispelter; Lhoste; et al. Journal of Heterocyclic Chemistry, 1984 , vol. 21, # 2 p. 353 - 359

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Citation Number: 31

Abstract

Abstract The synthesis of benzonaphthothiophenes 9 and 10 and of benzophenanthrothiophenes 14–17 through Elbs cyclodehydration of ortho-methylated aroylbenzo [b] thiophenes is described. The occurrence of a rearrangement of the thiophene ring in the course of the cyclization is discussed as well as the influence of the temperature on a concurrent cyclodehydration process. Several of these poly-condensed thiophenes ...