Preparation of isoxazole-4,5-dicarboxylic diesters

Details Preparation of isoxazole-4,5-dicarboxylic diesters Preparation of isoxazole-4,5-dicarboxylic diesters

1991-03-11

1995-12-05

Daus, Donald G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544333, 544367, 544405, 546209, 546275, 548236, 548248, C07D26112

Patent

active

054730694

ABSTRACT:
The preparation of isoxazole-4,5-dicarboxylic diester of the formula I ##STR1## where R.sup.1 is any organic radical which is inert under the reaction conditions, and R.sup.2 and R.sup.3 are each alkyl, cycloalkyl or benzyl, entails reacting an aldoxime of the formula II ##STR2## with a diester of maleic or fumaric acid, of the formula III

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