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Oxidation of the alkaloid skimmianine produced a formyl derivative that reacted with homoveratrylamine to give the product of nucleophilic ipso-substitution 3-formyl-4-(3,4-dimethoxyphenylethylamino)-7,8- dimethoxyquinolin-2-one. The presence of the formyl group in the… Click to show full abstract
Oxidation of the alkaloid skimmianine produced a formyl derivative that reacted with homoveratrylamine to give the product of nucleophilic ipso-substitution 3-formyl-4-(3,4-dimethoxyphenylethylamino)-7,8- dimethoxyquinolin-2-one. The presence of the formyl group in the latter stimulated its further ipso-substitution at the H atom in acidic solution to form 4-(3,4-dimethoxyphenylethylamino)-7,8-dimethoxyquinolin-2-one, the structure of which was confirmed by an X-ray crystal structure analysis.
Journal Title: Chemistry of Natural Compounds
Year Published: 2021
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