作者:Hou-Jen Tsai
DOI:10.1080/10426500213415
日期:2002.8
(EtO)2P(O)CF2ZnBr, which was prepared from diethyl(bromodifluoromethyl)phosphonate (EtO)2P(O)CF2Br and zinc powder with an appropriate acylating reagents such as acetyl chloride CH3C(O)Cl, ethyl oxalyl chloride ClC(O)CO2Et, methyl oxalyl chloride ClC(O)CO2CH3, diethylcarbamoyl chloride ClC(O)NEt2, or ethyl chloroformate ClC(O)OEt in the solvent of monoglyme or triglyme gives diethyl 2-oxo-1,1-difluoropropylphosphonate
N-二乙基二氟(二乙氧基膦基)乙酰胺(EtO)2P(O)CF2C(O)NEt2和(二乙氧基膦基)二氟乙酸乙酯(EtO)2P(O)CF2C(O)OEt分别以良好的产率出现。然而,在(EtO)2P(O)CF2C(O)CO2Et的制备中,如果在1.5%的溴化亚铜存在下,不使用乙腈作为助溶剂,在室温下进行酰化反应24小时,则类似观察到神经毒剂氟膦酸二乙酯 (EtO)2P(O)F 和 (EtO)2P(O)CF CFP(O)(OEt)2。用格氏试剂 R'MgX 通过 Wittig 处理 2-氧代-1,1-二氟膦酸二乙酯衍生物 (EtO)2P(O)CF2C(O)R(R CH3、CO2Et、CO2Me、NEt2、OEt)的 THF 溶液-Horner-Emmons 反应生成 1,1-二氟烯烃 R'(CH3)C CF2、R'(CO2Et)C CF2 和 R'(NEt2)C CF2。在制备 (EtO)2P(O)CF2C(O)CO2Et