作者:Chuanfa Ni、Ya Li、Jinbo Hu
DOI:10.1021/jo060955l
日期:2006.9.1
unprecedented nucleophilic fluoroalkylation of simple epoxides with fluorinated sulfones was achieved to give the β-fluoroalkyl alcohols in one step. The negative “fluorine effect” in the nucleophilic fluoroalkylation of epoxides with fluorinated carbanions was probed by the reactivity comparison between carbanions PhSO2CF2- (3) and PhSO2CCl2- (4) and between carbanions PhSO2CHF- (7) and PhSO2CHCl- (13). The
简单的环氧化物与氟化砜的前所未有的亲核性氟代烷基化反应,一步一步即可制得β-氟代烷基醇。在用氟化碳负离子环氧化物的亲核氟烷基化的负“氟效果”是由碳负离子PhSO之间的反应性的比较探测2 CF 2 - (3)和PhSO 2的CCl 2 - (4)和负碳离子之间PhSO 2 CHF - (7)和PhSO 2三氯甲烷- (13)。发现通过引入另一个吸电子的苯磺酰基来介导这种氟效应是一种有效增加氟化碳负离子亲核性的有效方法,其反应顺序为[(PhSO 2)2 CF - ](16)> PhSO 2 CFH - (7)»PhSO 2 CF 2 - (3)。