propargylic and allenic aluminum reagents have been easily prepared by a direct insertion of aluminum into propargylic bromides in the presence of PbCl2 (1 mol %). These organoaluminum reagents react with carbonyl compounds to afford the corresponding allenic alcohols or homopropargylic alcohols in good to excellent yields with high regio‐ and diastereoselectivity.
通过在PbCl 2(1 mol%)存在下将铝直接插入到炔丙基
溴中,可以很容易地制备出各种炔丙基和烯丙基铝试剂。这些
有机铝试剂可与羰基化合物反应,以高至极高的选择性和高非对映选择性提供相应的
烯丙醇或均
丙炔醇。