Recherches sur la formation et la transformation des esters LXXVI [1] Sur la réaction de l'isocyanate d'o-méthoxycarbonyl-phényle avec quelques acides amino (ou hydrazino) alcoyl-orthophosphoriques et -sulfuriques

o-Methoxycarbonyl-phenyl isocyanate reacts with mono-aminoalkyl orthophosphoric and sulfuric acids to yield the corresponding 1,2,3,4-tetrahydroquinazoline-2,4-dione-3-ethyl phosphoric (or sulfuric) monoesters which are isolated as sodium salts. 1,2,3,4-Tetrahydroquinazoline-2,4-dione-3-ethyl phosphoric acid has been isolated by adding hydrochloric acid to an aquous solution of its sodium salt.