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US 4,393,011 AGranted
Method for the preparation of fluorine-containing phosphonates and phosphonic acids
AssigneeUniversity of Iowa Research Foundation
InventorsDonald J. Burton, Richard M. Flynn
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Abstract
Fluorine-containing phosphonates and phosphonic acids are described. The method of preparation is a reaction of trialkylphosphites with dihalodifluoromethanes or a reaction of the salts of dialkylphosphites with halodifluoromethylphosphonates. The corresponding phosphonic acids are prepared by hydrolysis of the phosphonates.
Claims1
A method of making a compound having the formula ##STR37## comprising reacting a compound of the formula:
- ##STR38## with a compound of the formula:
- ##STR39## wherein R and R' are alkyl from 1 to 6 carbon atoms, M is alkali metal and X is halogen selected from the group consisting of chlorine, bromine and iodine.
Dependencies are inferred from the claim text.