Synthesis and photochromic behaviour of naphthopyrans, pyranoquinolines, pyranoquinazolines and pyranoquinoxalines

…, R Guglielmetti, R Dubest, J Aubard

Index: Pozzo, Jean-Luc; Samat, Andre; Guglielmetti, Robert; Dubest, Roger; Aubard, Jean Helvetica Chimica Acta, 1997 , vol. 80, # 3 p. 725 - 738

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Citation Number: 57

Abstract

Abstract New chromenes annulated with different six-membered azaheterocycles were prepared, ie, the 3H-pyra-no [3, 2-f] quinolines 9/10 and 14, the 8H-pyrano [2, 3-h] isoquinoline 11, the 8H-pyrano [3, 2-f] quinazolme 12, the 8-H-pyrano [3, 2-f] quinoxaline 13, and the 2H-pyrano [2, 3-f] isoquinoline 15. The synthesis was achieved using conveniently substituted α, β-unsaturated aldehydes and organotitanium intermediates arising from ...