Synthesis of aryl(difluoromethylenephosphonates) via electrophilic fluorination of α-carbanions of benzylic phosphonates with N-fluorobenzenesulfonimide
作者:Scott D. Taylor、Christopher C. Kotoris、A.Nicole Dinaut、Mei-Jin Chen
DOI:10.1016/s0040-4020(97)10395-7
日期:1998.2
The electrophilic fluorination of a wide variety of benzylic phosphonates with N-fluorobenzenesulfonimide has been examined. The fluorination reaction proceeds well in the presence of an array of functional groups such as nitro, bromo, ketone, ester, phenyl and ether groups. Phenyl and biphenyl derivatives containing two α,α-difluoromethylenephosphonate groups can also be prepared. This procedure is
已经研究了多种苄基膦酸酯与N-氟苯磺酰亚胺的亲电子氟化。在一系列官能团如硝基,溴,酮,酯,苯基和醚基的存在下,氟化反应进行得很好。也可以制备含有两个α,α-二氟亚甲基膦酸酯基的苯基和联苯衍生物。该方法与甲基或乙基膦酸酯相容,但是与叔丁基酯或在对位处含有另外的苄基部分的苄基膦酸酯不相容。