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

1.50 g (6.07 mmol) of 2-methyl-3,5-dioxo-4-phenyl-2,3,4,5-tetrahydro-1,2,4-triazine-6-carboxylic acid and 1.16 g (9.10 mmol) of oxalyl chloride were dissolved in dichloromethane (30 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 under reduced pressure 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