反应详情

14 g of 2-phthalimidomethyl-6-methyl-4-(2-chlorophenyl)-1,4-dihydropyridine-3,5-dicarboxylic acid diethyl ester are heated to the boil in 150 ccs of ethanol, with the addition of 5 ccs of hydrazine hydrate, for 2-3 hours, the mixture is filtered hot and the filtrate is filtered again after cooling and concentrated in vacuo.

1. filtrationthe mixture is filtered hot
2. filtrationthe filtrate is filtered again
3. temperatureafter cooling
4. concentrationconcentrated in vacuo