One-pot synthesis of 2,2′-bisbenzofurans using cuprous chloride as a catalyst
摘要:
A variety of novel 5,5'-disubstituted-2,2'-bisbenzofuran derivatives were synthesized by treatment of 4-substituted-2-(2-trimethylsilylethynyl)phenyl tert-butyldimethylsilyl ether analogues with Cud I as a catalyst in 62-82% isolated yields. This novel strategy provides a straightforward and simple pathway for the preparation of 2,2'-bisbenzofuran derivatives of interest in life and material sciences. (c) 2013 Elsevier Ltd. All rights reserved.
One-pot synthesis of 2,2′-bisbenzofurans using cuprous chloride as a catalyst
摘要:
A variety of novel 5,5'-disubstituted-2,2'-bisbenzofuran derivatives were synthesized by treatment of 4-substituted-2-(2-trimethylsilylethynyl)phenyl tert-butyldimethylsilyl ether analogues with Cud I as a catalyst in 62-82% isolated yields. This novel strategy provides a straightforward and simple pathway for the preparation of 2,2'-bisbenzofuran derivatives of interest in life and material sciences. (c) 2013 Elsevier Ltd. All rights reserved.
Cyclization of Gold Acetylides: Synthesis of Vinyl Sulfonates via Gold Vinylidene Complexes
作者:Janina Bucher、Thomas Wurm、Kumara Swamy Nalivela、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/anie.201310280
日期:2014.4.7
Differently substituted terminal alkynes that bear sulfonate leaving groups at an appropriate distance were converted in the presence of a propynyl gold(I) precatalyst. After initial formation of a gold acetylide, a cyclization takes place at the β‐carbon atom of this species. Mechanistic studies support a mechanism that is related to that of dual gold‐catalyzed reactions, but for the new substrates