General and highly active catalyst for mono and double Hiyama coupling reactions of unreactive aryl chlorides in water
作者:Dong-Hwan Lee、Ji-Young Jung、Myung-Jong Jin
DOI:10.1039/c0cc03535a
日期:——
A new beta-diketiminatophosphane Pd catalyst was found to be highly effective in the mono and double Hiyama couplingreactions of unactivated arylchlorides in water.
Improved Synthesis of Aryltrialkoxysilanes via Treatment of Aryl Grignard or Lithium Reagents with Tetraalkyl Orthosilicates
作者:Amy S. Manoso、Chuljin Ahn、Arash Soheili、Christopher J. Handy、Reuben Correia、W. Michael Seganish、Philip DeShong
DOI:10.1021/jo048667h
日期:2004.11.1
General reaction conditions for the synthesis of aryl(trialkoxy)silanes from aryl Grignard and lithium reagents and tetraalkyl orthosilicates (Si(OR)4) have been developed. Ortho-, meta-, and para-substituted bromoarenes underwent efficient metalation and silylation at low temperature to provide aryl siloxanes. Mixed results were obtained with heteroaromatic substrates: 3-bromothiophene, 3-bromo-4-methoxypyridine