METHOD FOR PREPARING 2,4-DICHLORO-2-DICHLOROPHOSPHORYLBUTANOIC ACID CHLOROANHYDRIDE

摘要

FIELD: chemical technology. ^ SUBSTANCE: invention relates to a method for synthesis of 2,4-dichloro-2-dichlorophosphorylbutanoic acid chloroanhydride of the formula: . Method involves interaction of phosphorus pentachloride with gamma-butyrolactone in inert organic solvent medium followed by formation of intermediate adduct of phosphorus pentachloride and gamma-butyrolactone that then is treated with sulfur-containing compound up to preparing the end product. As a sulfur-containing compound the method involves using sulfuryl chloride, and treatment is carried out at temperature above 25°C. Method provides simplifying process and enhanced yield of the end product. ^ EFFECT: improved preparing method. ^ 1 ex