Methyl Acetate → HCID 22909616, compound

Participants

Reaction Steps

6.7 g (20 mmol) of methyl 6-amino-5-cyano-4-(2,3-dichlorophenyl)-2-methyl-1,4-dihydropyridine-3-carboxylate and 33.5 ml (350 mmol) of acetic anhydride are heated under reflux for 30 minutes. Excess acetic anhydride is then converted into methyl acetate by addition of methanol at 25° C., while stirring. The reaction solution is evaporated in vacuo and toluene is then shipped off from the residue twice in vacuo. The residue is then boiled up with 50 ml of toluene. The crystals which have separated out are filtered off and washed with toluene.

Provenance & Evidence