2,4-Dichlorobenzylamine → N-(2,4-dichlorobenzyl)-3-oxo-6-pyridin-4-yl-2,3-dihydropyridazine-4-carboxamide

Participants

Reaction Conditions

Reaction Steps

0.02 cm3 of dimethylformamide and then 0.12 cm3 of oxalyl chloride were added to 0.3 g of 3-oxo-6-(pyridin-4-yl)-2,3-dihydropyridazine-4-carboxylic acid prepared as described in patent FR 2 481 284, dissolved in 10 cm3 of dichloromethane. The reaction medium was stirred for 3 hours at 19° C. A further 0.12 cm3 of oxalyl chloride was then added and the mixture was stirred for a further one hour at 19° C. The reaction mixture was then poured onto a solution of 10 cm3 of dichloromethane containing 0.19 cm3 of triethylamine and 0.21 cm3 of 2,4-dichlorobenzylamine. The reaction medium was stirred for 12 hours at 19° C. and then filtered through a sinter funnel, rinsed with 10 cm3 of dichloromethane, 10 cm3 of distilled water and with 10 cm3 of aqueous normal hydrochloric acid solution. After drying (10 kPa; 20° C.), 0.25 g of N-(2,4-dichlorobenzyl)-3-oxo-6-pyridin-4-yl-2,3-dihydropyridazine-4-carboxamide was obtained in the form of a white solid melting at 233° C.

Provenance & Evidence