Controlled dilithiation of allene, with two equivalents of n-butyllithium, produces the propargyl dianion 5. The latter couples efficiently with carbonyl compounds to produce homopropargyl alcohols in high yields.
用两个当量的
正丁基锂对
丙二烯进行受控的二
锂化,生成炔丙基二阴离子5。后者与羰基化合物有效偶联,以高收率生产高炔
丙醇。