High yields of bis-(dialkoxyphosphonyl-methyl)- phosphinic esters, (RO)2 (O)-PCH2P(O)OR, bis-(aloxyphosphinyl-methyl)-phosphinic esters, [R(RO)(O)PCH2]2P(O)OR, are obtained by heating bis-chloromethyl-phosphinic esters, (CICH2)2P(O)OR, with alkylphoshites, phosphonites and phosphinites, repectively, at 170 to 180°C for several hours. Hydrolysis of these esters in achieved by refluxing with conc. HCl
双(二烷氧基膦酰基甲基)
次膦酸酯,(RO)2(O)-PCH 2 P(O)OR,双-(丙氧基膦酰基甲基)
次膦酸酯,[R(RO)(O)PCH)的高收率2] 2 P(O)OR,是通过分别将双
氯甲基
次膦酸酯(CICH 2)2 P(O)OR与烷基
亚磷酸酯,
亚膦酸酯和
次膦酸酯在170至180°C下加热几个小时而获得的。这些酯的
水解是通过与浓
碳酸氢钠回流而实现的。HCl长时间保存。