Patent ID: 6084111
Filing Date: 2000-07-04
Classification: C07D,C08G

Abstract:
A process of preparing a compound of formula I ##STR6## wherein X is selected from O, (CH.sub.2).sub.m O, S, (CH.sub.2).sub.m S, NH, (CH.sub.2).sub.m NH, COO.sup.-, (CH.sub.2).sub.m COO.sup.-, .sup.- OOC and .sup.- OOC(CH.sub.2).sub.m ;m is 1 to 6;n is 1 to 100;R.sub.1 is (C.sub.1 -C.sub.20) ester; andA is a saturated organic group selected from residues of polyol, polythiol, polyamine, and polyacid; comprising reacting a compound according of formula II ##STR7## with hydrogen peroxide in the presence of (a) tungstic acid or its metal salts, (b) phosphoric acid or its metal salts, and (c) at least one phase transfer catalyst.