Cu-Catalyzed Double S-Alkenylation of Potassium Sulfide: A Highly Efficient Method for the Synthesis of Various Thiophenes
摘要:
An efficient synthetic approach to variously substituted thiophenes has been developed through copper-catalyzed tandem S-alkenylation of potassium sulfide with 1,4-dilodo-1,3-dienes.
1,3-Butadienylzinc Trimer Formed via Transmetalation from 1,4-Dilithio-1,3-butadienes: Synthesis, Structural Characterization, and Application in Negishi Cross-Coupling
作者:Yi Zhou、Wen-Xiong Zhang、Zhenfeng Xi
DOI:10.1021/om3005004
日期:2012.8.13
The first well-defined 1,3-butadienylzinc trimers have been synthesized by transmetalation of 1,4-dilithio-1,3-butadienes with 1 equiv of ZnBr2. Their structures have been determined by single-crystal X-ray structural analysis. Their reaction chemistry has been demonstrated by Pd-catalyzed Negishi cross-coupling with iodobenzenes.