Diphenyl chlorophosphate

DescriptionDiphenyl chlorophosphate is a viscous colorless liquid. It can be prepared in situ by the reaction between diphenyl hydrogen phosphonate and carbon tetrachloride. It is used to prepare aromatic polyesters by polycondensation reaction in pyridine and polyesteramide. Diphenyl chlorophosphate is used as a phosphonating agent, such as to prepare phenylphosphonic acid.

UsesDiphenyl chlorophosphate can be used to synthesize methadone, an opioid used for opioid maintenance therapy and for pain relief. It is used to control seedling grasses in turf. It undergoes anhydrous condensation with ethyl-4-bromo-butyrate and the hydrolysis product in alkaline medium of this condensation reaction is used in the quantitative determination of 3-cyano-3,3-diphenylpropionic acid.

UsesDiphenyl chlorophosphate is used to prepare cyclohexyl-amidophosphoric acid diphenyl ester by reacting with cyclohexylamine. It is also used in the synthesis of alfa-substituted beta-lactams, anhydrides, esters and thioesters. It is also employed in the conversion of aldoximes to nitriles. Further, it is used in the preparation and reaction of enol phosphates, guanosine-adenosine-5',5'-triphosphate, guanosine-cytidine-5',5'-triphosphate, guanosine-uridine-5',5'-triphosphate, diguanosine-5',5'-diphosphate and diguanosine-5',5'-triphosphate. In addition to this, it serves as a phosphorylating agent for the preparation of 2-deoxy-D-galactose-3 and -6 phosphoric acids.

UsesDiphenyl chlorophosphate may be used:in the preparation of guanosine-adenosine-5′,5′-triphosphate, guanosine-cytidine-5′,5′-triphosphate, guanosine-uridine-5′,5′-triphosphate, diguanosine-5′,5′-diphosphate and diguanosine-5′,5′-triphosphateas phosphorylating agent for the synthesis of 2-deoxy-D-galactose-3 and -6 phosphoric acidsin the synthesis of diaryl phosphoryl derivatives of alkylene dithiophosphates

General DescriptionA clear colorless to light yellow liquid with a pungent odor. Insoluble in water and denser than water. Hence sinks in water. Contact may severely irritate skin, eyes and mucous membranes. Flash point above 235°F.

PreparationThe preparation of Diphenyl chlorophosphate is as follows:With a thermometer,Reflux condenser and mechanical agitation120 g of dichloromethane was placed in a 500 ml four-neck reaction flask.7.3 g of N,N-dimethylformamide,Stirring temperature control below 10 °C,Put 28g of bis(trichloromethyl) carbonate,A solution of 50 g of diphenyl phosphate and 120 g of dichloromethane was added.After the addition, the reaction was carried out for 3 hours. After the end of the reaction, the temperature was controlled below 10 ° C, 20 g of water was slowly added, and the mixture was stirred and the organic phase was dried over anhydrous sodium sulfate. The desiccant was removed by filtration, and the filtrate was evaporated under normal pressure. The temperature was lowered to 0 ° C, and the insoluble matter was removed by filtration to obtain 48.9 g of diphenyl chlorophosphate. The purity of GC was 99.2%, and the yield was 90.3%.