| abstract |
where R is aryl or chloroalkyl of 2 to 10 carbon atoms, R'' is aryl, aryloxy or chloroalkyloxy of 2 to 10 carbon atoms, R'''' is hydrogen, alkyl, alkenyl, furanyl or aryl of 1 to 15 carbon atoms and substituted aryl forms where the substituent is fluorine, chlorine, bromine, cyano, hydroxyl, alkyloxy, alkylthio or mixtures of such substituents, and Y is 0 or S. The organophosphorus compounds have biological activity and are also useful as fire retardants. The present invention relates to new compounds containing urea and organophosphorus moieties in cyclic structures, to a new process for production of such compounds, and to new organophosphorus acids produced by hydrolysis of the cyclic structures. |