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Naphthopyrans by ring-closure of substituted naphthalenes using potassium t-butoxide in dimethylformamide
Journal article   Peer reviewed

Naphthopyrans by ring-closure of substituted naphthalenes using potassium t-butoxide in dimethylformamide

R.G.F. Giles, I.R. Green, V.I. Hugo, P.R.K. Mitchell and S.C. Yorke
Journal of the Chemical Society, Perkin Transactions 1, pp.2309-2313
1983
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Abstract

Two 2-alkenyl-3-hydroxyalkyl-1,4-dimethoxynaphthalenes are cyclised with potassium t-butoxide in dimethylformamide to give 3-alkyl-3,4-dihydro-5,10-dimethoxynaphtho [2,3-c] pyrans under anaerobic conditions. One of these products is treated with the same solvent and base, but in air, to give the two possible 4-hydroxy derivatives.

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