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Paper | Regular issue | Vol 63, No. 3, 2004, pp.567-582
Published online, 16th January, 2004
DOI: 10.3987/COM-03-9956
■ Synthesis and Photochromic Properties of Methoxy Substituted 2,2-Diaryl-2H-naphtho[1,2-b]pyrans

Christopher D. Gabbutt, John D. Hepworth, B. Mark Heron,* David A. Thomas, Colin Kilner, and Steven M. Partington

*Department of Colour Chemistry, The University of Leeds, Leeds, LS2 9JT, U.K.

Abstract

A series of methoxy-substituted 2,2-di(4-methoxyphenyl)-2H-naphtho[1,2-b]pyrans has been synthesised from 3-alkoxycarbonyl-1-naphthols and 1,1-di(4-methoxyphenyl)prop-2-yn-1-ol. The influence of the methoxy group on the wavelength of maximum absorption and the stability of the ring-opened naphthopyrans is discussed.