Reactions of acyl tributylphosphonium chlorides and dialkyl acylphosphonates with Grignard and organolithium reagents
作者:Hatsuo Maeda、Kenji Takahashi、Hidenobu Ohmori
DOI:10.1016/s0040-4020(98)00767-4
日期:1998.10
Ketones and esters (4) were effectively prepared by reaction of Grignard reagents with acyl tributylphosphonium chlorides (2), diethyl acylphosphonates (5), or diisopropyl acylphosphonate (6) derived from acid chlorides and chloroformates (1). Although by the method with 2, 4 is prepared in one-pot operation from 1 and generally in a higher yield, the method with 5 or 6 proved to compensate for the
酮和酯(4)进行了有效通过与酰基三丁基氯化物(格氏试剂反应而制备2),二乙基acylphosphonates(5),或二异丙酰基膦酸酯(6从酰氯和氯甲酸酯(派生)1)。虽然通过该方法2,4是在单罐操作制备从1且通常在一个更高的产率,该方法5或6证明,以补偿的合成4用2在某些方面。的反应性2,5,并还通过比较它们的还原电位与酰基氯的还原电位来评估6作为亲电试剂。