Chromene chromium carbene complexes in the syntheses of naphthopyran and naphthopyrandione units present in photochromic materials and biologically active …

M Rawat, V Prutyanov, WD Wulff

Index: Wulff, William D.; Tang, Peng-Cho; McCallum, J. Stuart Journal of the American Chemical Society, 1981 , vol. 103, # 25 p. 7677 - 7678

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Citation Number: 45

Abstract

The carbene complex 5-(2, 2-dimethyl-2 H-chromene) methoxylmethylene chromium pentacarbonyl will undergo a benzannulation reaction with phenylacetylene, 1-pentyne, 3- hexyne, and trimethylsilylacetylene to give 7-hydroxy-10-methoxy-3 H-naphtho [2.1-b]