An Efficient and Practical Synthesis of Dibenzo[d,f][1,3]-dioxepines from 2,2′-Dihydroxybiphenyl with Terminal Alkynes Catalyzed by Lewis Acid TiCl<sub>4</sub>
作者:Haisheng Wu、Jin Yang、Lei Wang
DOI:10.1002/cjoc.201190225
日期:2011.6
A synthetic strategy toward the cyclic addition of 2,2′‐dihydroxybiphenyl to terminalalkynes has been developed using LewisacidTiCl4 as catalyst. The reactions generated dibenzo[d,f][1,3]dioxepines derivatives in good yields with excellent regio‐selectivity in the presence of catalytic amount of TiCl4 under mild reaction conditions.