The preparation of cholesteryl dihydrogen phosphate via chloesteryl phosphorodichloridate is described; although the reaction was successful for the preparation of ergosteryl and lanosteryl phosphorodichloridates, it failed with cholestanol and thiocholesterol. Dicholesteryl phosphorochloridate has been prepared but not diergosteryl or dilanosteryl phosphorochloridates. The hydrolysis of cholesteryl phosphorodichloridate has been ...