Abstract:
There is disclosed an improved process for the addition of phospinesto alpha-olefins at high yields and conversions. The process involves the absence of a catalyst whose residues could interfere with the utility of the product, such as n-hexyldiphenylphosphine, as a ligand. Simple thermal reaction is used at temperatures of at least 200°C., most preferably 250°C - 350°C. The pressure is preferably at least atmospheric. Preferred reactants, pnoducts, and pracessing conditions are also disclosed. Batch processes are exemplified and continuous processes proposed.
Abstract:
Dialkylphenylphosphonates are prepared by the reaction of a metal alkoxide with a phenyl phosphonic dihalide. The reactants are combined to give a temperature rise to 60°C within 15 minutes, resulting in improved yields and assay of product.
Abstract:
Dialkylphenylphosphonates are prepared by the reaction of a metal alkoxide with a phenyl phosphonic dihalide. The reactants are combined to give a temperature rise to 60°C within 15 minutes, resulting in improved yields and assay of product.
Abstract:
A process is disclosed for preparing alkyldiarylphosphines and related compounds. In such process a compound having the structural formula: wherein :
Z is an atom from group VA of the periodic table; Y is any radical that is essentially incapable of reacting with an alkali metal; X is any radical that is essentially incapable of reacting with an alkali metal; W is a substituted or unsubstituted aryl, alkyl, arylalkyl, or alkylaryl radical or hydrogen; and is prepared by reacting a first halide with a molten alkali metal or amalgam thereof in the presence of an inert solvent to form a first reacted mixture which is reacted with a second halide wherein an amount of the alkali metal or amalgam thereof is used in an excess of less than 100% and the yield of the product is greater than 70%. Typically, diphenylphosphinous chloride is reacted in solution with an excess of an alkali metal; and the reaction product reacted with chorohex- ane thereby forming hexyldiphenylphosphine. The improved process produces greater yields, by use of critical amounts of alkali metal; use of a single reactor rather than two reactors; preinitiation of the first stage reaction reduction of temperatures to increase reaction rate under certain conditions; and preferred reactants and physical form thereof. Novel products include behenyldiphenylphosphine.