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DOI: 10.1039/A900730J (Paper) Reference Section for: Chem. Commun., 1999, 541-542

A novel acylative ring cleavage of benzothieno[3,2-b]pyran-4-ols: application to the synthesis of dibenzothiophenes and fused-ring derivatives

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Christopher D. Gabbutt, John D. Hepworth, B. Mark Heron and Jean-Luc Thomas

Abstract

The benzothienopyranols 3, readily available from the ketone 1, are transformed to the carbamates 5 on treatment with N,N-dimethylcarbamoyl chloride, subsequent thermal electrocyclisation provides access to dibenzothiophene derivatives 6 and 11–13.

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