ScienceDirect - Tetrahedron Letters : Derivatives of naphtho[2,3-c]pyran-5,10-dione ; a simple synthesis and a note of their chromogenic properties.

Tetrahedron Letters
Volume 27, Issue 2, 1986, Pages 255-258

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doi:10.1016/S0040-4039(00)83990-8

Derivatives of naphtho[2,3-c]pyran-5,10-dione ; a simple synthesis and a note of their chromogenic properties.

Michael F. Aldersley, Francis M. Dean and Ahad S. Hamzah

The Robert Robinson Laboratories, The Unversity of Liverpool, Liverpool, L69 3BX UK

Received 14 November 1985.

Available online 8 March 2001.

Abstract

Appropriate -ylides convert 2-methyl-1,4-naphthoquinone into 3-(acylmethyl) derivatives which can be cyclised to naphtho[2,3-c]pyran-5,10-diones by treatment with bromine and dehydrobromination with triethylamine; these diones give a variety of striking colours in acid media.

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Tetrahedron Letters
Volume 27, Issue 2, 1986, Pages 255-258

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