Copper catalyzed regioselective coupling of allylic halides and alkynes promoted by weak inorganic bases
作者:Lothar W. Bieber、Margarete F. da Silva
DOI:10.1016/j.tetlet.2007.08.010
日期:2007.10
Allylic halides and terminal alkynes couple under CuI catalysis in DMSO or DMF solution. In most cases, sodium carbonate or bicarbonate is sufficient to promote the reaction; less reactive alkynes require catalytic amounts of DBU. Bifunctional alkynes and halides can be reacted selectively according to the stoichiometry used. Trimethylsilyl, hydroxyl, ester and halide groups are tolerated in the alkyne
烯丙基卤化物和末端炔烃在CuI催化下在DMSO或DMF溶液中偶联。在大多数情况下,碳酸钠或碳酸氢钠足以促进反应。反应性较低的炔烃需要催化量的DBU。双官能炔烃和卤化物可以根据所用的化学计量选择性地反应。炔烃中可容忍三甲基甲硅烷基,羟基,酯和卤化物基团。大多数卤化物反应时不进行烯丙基重排。该方法适合于官能化的炔烃的合成。