Dimethylformamide → 2-Methyl-3,5-dioxo-4-phenyl-2,3,4,5-tetrahydro-1,2,4-triazine-6-carbonyl chloride

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Reaction Steps

0.93 g (3.76 mmol) of 2-methyl-3,5-dioxo-4-phenyl-2,3,4,5-tetrahydro-1,2,4-triazine-6-carboxylic acid and 0.72 g (5.64 mmol) of oxalyl chloride were dissolved in dichloromethane (20 ml). To the mixture, a drop of N,N-dimethylformamide was added and stirred at room temperature for 2 hours. The reaction solution was concentrated to obtain 2-methyl-3,5-dioxo-4-phenyl-2,3,4,5-tetrahydro-1,2,4-triazine-6-carbonyl chloride as a pale yellow oily substance.

Provenance & Evidence