A metal-free, visible light-induced [4+2] benzannulation of biaryldiazonium salts with alkynes was developed. With eosin Y as photoredox catalyst, a variety of 9-substituted or 9,10-disubstituted phenanthrenes were obtained via a cascade radical addition and cyclization sequence.
开发了一种无
金属,可见光诱导的联炔重氮盐与
炔烃的[4 + 2]苯环。以
曙红Y为光氧化还原催化剂,通过级联自由基加成和环化顺序获得了多种9-取代或9,10-二取代的
菲。