Reactions of 1,2,2,2-tetrachloroethyl isocyanate with trialkyl and trimethylsilyl phosphites
作者:P. P. Onys’ko、N. K. Maidanovich、A. D. Sinitsa
DOI:10.1007/s11176-005-0008-5
日期:2004.9
The reaction of 1,2,2,2-tetrachloroethyl isocyanate with trialkyl phosphites is unselective. It involves chlorine substitution, addition by the isocyanate group, and dehydrochlorination and gives rise to a mixture of mono- and diphosphorylated compounds. Diethyl trimethylsilyl phosphite more selectively reacts with 1,2,2,2-tetrachloroethyl isocyanate. At a 1:1 molar reagent ratio, an α-phosphorylated trichloroethyl isocyanate is formed, and at a 2 : 1 ratio, chlorine substitution and addition by the isocyanate group take place to give a related 1,3-diphosphonate.
1,2,2,2-四氯乙基异氰酸酯与亚磷酸三烷基酯的反应是非选择性的。它涉及氯取代、异氰酸酯基团加成和脱氯化氢,并产生单磷酸化和二磷酸化化合物的混合物。亚磷酸二乙基三甲基甲硅烷基酯更选择性地与1,2,2,2-四氯乙基异氰酸酯反应。在1:1摩尔试剂比下,形成α-磷酸化三氯乙基异氰酸酯,在2:1摩尔比下,发生异氰酸酯基团的氯取代和加成,得到相关的1,3-二膦酸酯。