Preparation of halohydrocarbyl phosphonic acid diesters
In a process for the production of halohydrocarbyl phosphonic acid diesters via a Michaelis-Arbuzov type reaction which results in high conversion and selectivity of product with ease of purification; the improvement comprises reacting hydrocarbyl halide with trihdydrocarbyl phosphite in a molar ratio of about 6:1 and in the presence of an effective amount of a polarity lowering additive.
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Page/Page column 6
(2008/06/13)
Oxidative alkoxylation of zinc phosphide in alcoholic solutions of copper(II) chloride
Oxidative alkoxylation of Zn3P2 with the formation of valuable phosphoric and phosphorous acid esters occurred at a high rate and with a high selectivity in alcoholic solutions of CuCl2 under the action of oxygen at 30-60°C. Depending on the nature of the alcohol, two products were formed, namely, trialkyl phosphates (RO)3PO and dialkyl phosphites (RO)2HPO. Water favored the formation of dialkyl phosphates (RO)2(HO)PO. The kinetics and mechanism of the new catalytic reaction were studied, and the optimal conditions for conducting this reaction were found. The reaction proceeded in a topochemical mode by a separate redox mechanism.
Dorfman,Ibraimova,Polimbetova
p. 50 - 55
(2007/10/03)
New synthesis of phosphorous and phosphoric acid esters
Reaction of alcohols with dialkyl phosphites in the presence of titanium tetraalkoxides results in a displacement of both or one ester function(s) by the RO groups of the alcohol used. The mixed phosphites, (R3O)(R1O)P(O)H, prepared by this method can be used as substrates for the mixed phosphates, (R4O)(R3O)(R1O)PO.