Organische Phosphorverbindungen 40. Methoden zur Herstellung von Pentamethylen-1,5-bis-(dihydroxyphosphonylmethyl-phosphinsäure) [1]
作者:Ludwig Maier
DOI:10.1002/hlca.19700530746
日期:——
alkyl chloromethylphosphonates, ClCH2P(O)(OR)2, at 170° for several hours until evolution of alkyl halides ceases. Hydrolysis to the corresponding acid (VIII) is effected by refluxing with conc. HCl for 40 h.
通过加热烷基五亚甲基-1,5-二膦酸酯,(RO)2 P(CH 2)5 P(OR)2,高产率地形成烷基-五亚甲基-1,5-双-(二烷氧基膦酰基甲基次膦酸酯)(VII),用氯甲基膦酸烷基酯ClCl 2 P(O)(OR)2在170°下搅拌数小时,直到烷基卤化物的生成停止。通过与浓盐酸回流,水解为相应的酸(VIII)。HCl 40小时。