Enantioselective Synthesis, Crystal Structure, and Photophysical Properties of a 1,1′‐Bitriphenylene‐Based Sila[7]helicene

Abstract

Abstract A 1,1′‐bitriphenylene‐based sila[7]helicene was synthesized with a high ee value by enantioselective double [2+2+2] cycloaddition of a biaryl‐linked tetrayne with a silicon‐linked bis(propargylic alcohol) as a key step. This sila[7]helicene exhibited a high tolerance toward racemization, which could be explained by the X‐ray crystal structure analysis. With respect to the photophysical properties, this sila[7]helicene exhibited a relatively high fluorescence quantum yield and circularly polarized luminescence activity.