Acceleration of CuI-catalyzed coupling reaction of alkyl halides with aryl Grignard reagents using lithium chloride
作者:Kenya Nakata、Chao Feng、Toshifumi Tojo、Yuichi Kobayashi
DOI:10.1016/j.tetlet.2014.08.089
日期:2014.10
CuI-catalyzed coupling reaction of R(alkyl)-X with Ar(aryl)MgBr at rt was completed within 2 h. Effective leaving groups X in R-X were Br, I, OTs, but not Cl. Grignard reagents ArMgBr with both standard and bulky Ar such as 2-MeC6H4, 2-MeOC6H4, and 2,6-(Me)2C6H3 afforded the desired products in good yields. Ester and cyano groups in R-X were tolerated. Coupling reaction with R(alkyl)-MgBr proceeded as
在LiCl的存在下,在室温下2小时内完成CuI催化的R(烷基)-X与Ar(芳基)MgBr的偶联反应。RX中有效的离去基团X是Br,I,OT,但不是Cl。带有标准Ar和大块Ar的格氏试剂ArMgBr(例如2-MeC 6 H 4,2 -MeOC 6 H 4和2,6-(Me)2 C 6 H 3)以良好的收率提供了所需的产物。RX中的酯基和氰基基团是可容忍的。与R(烷基)-MgBr的偶联反应也进行。