CYCLIC PHOSPHOROUS ACID ESTERS AND PROCESS

摘要

Novel organic phosphorus compounds containing at least one phosphorus atom, which may be present in the trivalent state, at least two carboxylic acid ester groups and a phosphorus to carbon double linkage prepared by reacting a malonic acid diester with a compound of trivalent phosphorus having directly linked to the phosphorus atom at least two halogen atoms capable of reacting with activated hydrogen atoms. (The reaction malonic acid diethyl ester with phenyl phosphine dichloride and the resulting reaction product are not within the scope of the instant invention).