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THE ACTION OF CERTAIN DIHALOID HYDROCARBON DERIVATIVES ON ETHYL ESTER OF PHOSPHOROUS ACID AND ON SALTS OF DIETHYL PHOSPHOROUS ACID,
DIRECTORATE OF SCIENTIFIC INFORMATION SERVICES OTTAWA (ONTARIO)
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The reaction of methylene iodide with the ethyl ester of phosphorus acid yielded iodomethyl phosphorous acid diethyl ester I, rather than the expected ethyl ester of methane diphosphonic acid II. The reaction of I with Na diethyl phosphite III also failed to yield II, and the action of K diethyl phosphite on I resulted in an ethyl ester of hydroxymethyl phosphonic acid IV. The saponification of IV gave the hydroxymethyl phosphonic acid HOCH2POOH2. The ethyl ester of propane diphosphonic acid V was formed as the reaction product of trimethylene bromide and III. The saponification product of V was a very stable tetrabasic acid.
APPROVED FOR PUBLIC RELEASE