Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system
Patent
1983-02-15
1985-02-12
Ford, John M.
Organic compounds -- part of the class 532-570 series
Organic compounds
Four or more ring nitrogens in the bicyclo ring system
544197, C07D25170
Patent
active
044992688
ABSTRACT:
A novel process for the preparation of isomelamines of the formula I, ##STR1## which is characterized in that an N-cyano-N-(ar or cyclo)alkylcarboxylic acid amide or N-cyano-N-allylcarboxylic acid amide of the formula II or III ##STR2## is reacted with aqueous sodium hydroxide solution, potassium hydroxide solution or ammonia solution or a primary aliphatic or cycloaliphatic amine in a solvent or with a primary aliphatic alcohol in the presence of a catalytic amount of a basic compound in a temperature range from -20.degree. C. to 200.degree. C., at least 3 hydroxyl or amino group equivalents being used per 3 carboxylic acid amide group equivalents.
The isomelamines prepared by the process according to the invention are valuable curing agents for epoxide resins.
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patent: 2485983 (1949-10-01), Nagy
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S. A. Miller et al., J. Appl. Chem. 6, 89 (1956).
R. Kitawaki et al., J. Org. Chem. 25, 1043 (1960).
G. Rapi et al., J. Chem. Soc. (C), 1971, 3827.
Lohse Friedrich
Zondler Helmut
Ciba Geigy Corporation
Ford John M.
Hall Luther A. R.
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