Conjugate Addition of Diethyl 1-Fluoro-1-phenylsulfonylmethanephosphonate to α,β-Unsaturated Compounds
作者:Stanislav Opekar、Radek Pohl、Václav Eigner、Petr Beier
DOI:10.1021/jo400297f
日期:2013.5.3
Diethyl 1-fluoro-1-phenylsulfonylmethanephosphonate (1) in the presence of cesium carbonate undergoes efficient 1,4-addition to Michael acceptors having terminal double bonds such as α,β-unsaturated ketones, esters, sulfones, sulfoxides, and phosphonates to yield the corresponding adducts in good to excellent yields. In the presence of sodium hydride, 1 reacts with α,β-enones to provide γ-fluoro-γ-phenylsulfonylenol
在碳酸铯存在下,将1-氟-1-苯基磺酰基甲烷膦酸二乙酯(1)有效地与具有末端双键的迈克尔受体(例如α,β-不饱和酮,酯,砜,亚砜和膦酸酯)进行有效的1,4-加成反应,得到相应的加合物,收率良好。在氢化钠的存在下,1与α,β-烯酮反应,生成由1,4-加成,随后膦酸酯到磷酸重排产生的γ-氟-γ-苯基磺酰亚磷酸酯。