Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Patent
1989-02-24
1990-07-31
Shippen, Michael L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
544283, 544335, 544336, 544353, 546147, 546174, 546342, 548180, 548204, 548217, 548236, 549 32, 549 79, 549471, 549501, 560 18, 560118, 560126, C07C 67347
Patent
active
049451782
ABSTRACT:
Acetoacetic esters of the formula R--OOCCH.sub.2 COCH.sub.3 are reacted with an unsaturated ester of the formula R.sup.1 R.sup.2 C.dbd.CHCOOR.sup.3 in the presence of basic catalyst such as ethanolic sodium ethoxide to give compound I of the formula ##STR1## and the alcohol by-product HOR.sup.3. By known hydrolysis and decarboxylation procedures, compound I is convertible to compound II of the formula ##STR2## In the above formulas, R is alkyl, R.sup.1 and R.sup.2 are each selected independently from H, alkyl, alkylthioalkyl, cycloalkyl, alkyl substituted cycloalkyl, aryl, substituted aryl, heterocyclic, or substituted heterocyclic, and R.sup.3 is alkyl or cycloalkyl. These compounds I and II are intermediates in the preparation of known herbicides.
REFERENCES:
patent: 3737442 (1973-06-01), Baum
patent: 3758549 (1973-09-01), Dexter
patent: 3865884 (1975-02-01), Agusto
patent: 3997590 (1976-12-01), Lester
Eastman Kodak Company
Heath, Jr. William P.
Reiter S. E.
Shippen Michael L.
Thomsen J. Frederick
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