Collection of Czechoslovak Chemical Communications

Synthetic reactions of dimethylformamide. XXV. Preparation of dimethylaminomalonaldehyde, 2-methoxy-, 2-ethoxy-, and 2-dimethylaminotrimethinium salts

Z Arnold

Index: Arnold,Z. Collection of Czechoslovak Chemical Communications, 1973 , vol. 38, p. 1168 - 1172

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Citation Number: 24

Abstract

Formylation of 1, 2-bis (dimethylamino) ethylene afforded the 2-dimethylaminotrimethinium salt Ill, the saponification of which with alkali led to dimethylaminomalonaldehyde. Formylation of dimethylaminoacetaldehyde dimethyl acetal and diethylacetal proceeds under the formation of 2-methoxy-and 2-ethoxytrimethinium salts. This observation confirms the formation ill situ of olefinic derivatives in. formylations of acetals and ketals of aliphatic ...

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