反应详情

A mixture of 0.13 g of 1-methyl-1H-pyrrole-2-carboxylic acid, 0.15 g of thionyl chloride and 5 ml of hexane was heated under reflux for 2 hours. The reaction mixture was concentrated under reduced pressure to obtain 0.14 g of 1-methyl-1H-pyrrole-2-carbonyl chloride. To a mixture of 0.22 g of N-(2-aminobenzoyl)-N′-ethoxycarbonylhydrazine and 10 ml of pyridine was added 0.14 g of the resulting 1-methyl-1H-pyrrole-2-carbonyl chloride, and the mixture was stirred at room temperature for 2 hours. Water was poured into the reaction mixture, and a deposited precipitate was collected by filtration to obtain 0.11 g of the present compound (2) of the formula:

1. temperaturewas heated
2. temperatureunder reflux for 2 hours
3. concentrationThe reaction mixture was concentrated under reduced pressure