Phenyl dichlorophosphite

A benzene suspension of phenyl dichlorophosphite added with stirring and cooling to benzoic acid in pyridine during 2 hours gave, after treatment with excess phenol followed by refluxing of the mixture for 4-5 hours, phenyl benzoate in 85% yield (ref.7). 

The procedure involves reaction in acetic anhydride, or in another solvent, followed by the addition of acetic anhydride to decompose the intermediate complex. The procedure has been extensively examined in relation to the 5-methyl- and 4,5-dimethyl-substituted compounds derived from ethenyl methyl and methyl isopropenyl ketones and with mesityl oxide which gives the 3,3,5-trimethyl-substituted compounds. Amongest the phosphorus reactants, the trichloride itself and methyl- " , ethyl- " " and phenyl- phosphonous dichlorides have been employed, as have ethyl and phenyP dichlorophosphites, ROPCI2. The use of 2-thienylphosphonous dichloride to give 137 is recorded as is that of the unsaturated ketone 138 to give 139. A more novel conversion is that of 140 into 141 in 25% yield with a similar conversion (15%) being observed for cholest-4-en-3-one. ... 

Phosphoric acid esters Ethyl metaphosphate Phosphate buffer Quinoline phosphate Dichlorophosphites, CH2OPCI2 Triethyl phosphate Phenyl acid phosphate Diphenyl hydrogen phosphate Di-p-nitro phenyl hydrogen phosphate (RO)sPS... 

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