Efficient Helicene Synthesis: Friedel–Crafts??type Cyclization of 1, 1??Difluoro??1??alkenes

J Ichikawa, M Yokota, T Kudo…

Index: Ichikawa, Junji; Yokota, Misaki; Kudo, Takao; Umezaki, Satoshi Angewandte Chemie - International Edition, 2008 ,  vol. 47,  # 26  p. 4870 - 4873

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Citation Number: 94

Abstract

Helicenes are nonplanar ortho-fused aromatic compounds with helical chirality.[1] Their extraordinary optical and electronic properties have been of interest for a long time.[2] During the last decade, studies have been carried out toward their application in asymmetric synthesis,[3] molecular recognition,[4] and materials science, for example, as liquid crystals, sensors, and dyes.[5]