m-CPBA/TFA: an efficient nonmetallic reagent for oxidative coupling of 1,2-diarylethylenes
作者:Kailiang Wang、Yanna Hu、Meng Wu、Zheng Li、Zhihui Liu、Bo Su、Ao Yu、Yu Liu、Qingmin Wang
DOI:10.1016/j.tet.2010.09.101
日期:2010.11
A mild synthesis of a series of phenanthrenes with different substituents on the phenanthrene ring is described. The method involves intramolecular oxidative coupling of a variety of 1,2-diarylethylene derivatives in the presence of m-chloroperoxybenzoic acid (m-CPBA) in trifluoroacetic acid (TFA) to yield phenanthrenes in high yields. The present approach solves a key step for the synthesis of polycyclic