The work aimed at synthesis of hydroxypropoxy compounds containing oxalamidoester group from oxamic acid (OA) and propylene carbonate (PC) substrates. The thermal stability of obtained products was tested to estimate their Usefulness for formation of polyurethane foams. The influence of initial molar ratio of reagents, amount Of catalyst and temperature of reaction between OA and PC on structure of product Was studied. The Matrix-Assisted Laser Desorption Ionization Time of Flight (MALDI ToF) analysis of products evidenced that in the conditions used the fort-nation of hydroxypropoxy derivatives of OA was accompanied by homocondensation of OA, which became minor process in presence of excess of PC. The physicochemical and thermal properties of products were studied. (C) 2008 Wiley Periodicals, Inc.