Cerium(III) chloride remarkably increases the rates of formation and yields of ketones in the reaction of lithium carboxylates with organolithiums
作者:Yoonmo Ahn、Theodore Cohen
DOI:10.1016/s0040-4039(00)76511-7
日期:1994.1
ketones in the reaction of organolithiums with lithium carboxylates. The CeIII suppresses the enolization of the lithium carboxylate, previously unrecognized as a competing reaction except in special cases, and the formation of tertiary alcohols. One of the reasons for the latter effect is a surprising increase in the rate of addition of the organometallic to the lithium carboxylate in the presence
CeCl 3的存在大大提高了有机锂与羧酸锂反应中酮的产率。Ce III抑制了羧酸锂的烯醇化作用,该反应以前未被公认是竞争性反应,除非在特殊情况下,还可以抑制叔醇的形成。后一种作用的原因之一是在Ce III的存在下,有机金属与羧酸锂的加成速率惊人地增加。