Tetrahedron

The synthesis and electronic absorption spectra of 3-phenyl-3 (4-pyrrolidino-2-substituted phenyl)-3H-naphtho [2, 1-b] pyrans: further exploration of the ortho …

CD Gabbutt, BM Heron, AC Instone

Index: Gabbutt, Christopher D.; Heron, B. Mark; Instone, Alicia C. Tetrahedron, 2006 , vol. 62, # 4 p. 737 - 745

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Citation Number: 25

Abstract

Introduction of a substituent into a sterically demanding 2-position of a 3-(4- pyrrolidinophenyl) ring of a 3, 3-diaryl-3H-naphtho [2, 1-b] pyran results in the generation of an additional short wavelength absorption band leading to organic photochromes that appear as dull shades of orange and red.