monofluorination and monochlorination of a wide variety of diethyl benzylphosphonates have been realized in a one-pot procedure. The monohalogenation was accomplished by intermediate of a benzylic carbanion protected with TMSCI using N-fluorobenzenesulfonimide (NFBS) and hexachloroethane, respectively. After mild removal of protecting group, this procedure delivers the α-monohalogenobenzylphosphonates in high yields
通过一锅法已经实现了多种
二乙基苄基膦酸酯的选择性亲电子单
氟化和单
氯化。通过分别使用N-
氟苯磺
酰亚胺(NFBS)和
六氯乙烷的TMSCI保护的苄基碳负离子的中间体来完成单卤化反应。轻度除去保护基团后,此步骤可高产率(68–97%)和纯净形式提供α-单卤代苄基
膦酸酯。