| abstract |
A METHOD OF PREPARING ORGANIC COMPOUNDS HAVING ONE OR MORE UREA, UTETHANE OR THIOURETHANE GROUPS BY REACTING CYCLIC NITRILE CARBONATES OF THE FORMULA: (2-(O=)-1,3,4-DIOXAZOL-5-YL)N-R WHEREIN R IS AN ORGANIC RADICAL WHICH IS FREE OF REACTIVE HYDROGEN ATOMS AND N IS 1 OR MORE, SUCH AS, ADIPODI (NITRILE CARBONATE), WITH NUCLEOPHILIC COMPOUNDS CONTAINING A REACTIVE HYDROGEN ATOM, SUCH AS POLYESTER AND POLYETHER POLYOLS IN THE PRESENCE OF A CATALYTICALLY-EFFECTIVE AMOUNT OF AN N-OXIDE OF AN AMINE AT A TEMPERATURE OF ABOUT 50* TO 150*C. |