Method for making cycloaliphatic epoxides
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United States of America Patent
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Jul 4, 2000
Issued Date -
N/A
app pub date -
Apr 17, 1998
filing date -
Apr 10, 1997
priority date (Note) -
Expired
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Abstract
Compounds having the formula ##STR1## 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 selected from H, (C.sub.1 -C.sub.20) alkyl, (C.sub.1 -C.sub.20) alkoxy and (C.sub.1 -C.sub.20) ester; and A is a saturated organic linking group selected from residues of polyol, polythiol, polyamine, and polyacid, are prepared by reacting compounds according to formula II ##STR2## 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.
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