Ammonium Acetate → HCID 178510337, 화합물

참여 물질

반응 단계

A mixture of 5-(dimethylamino)-2-[(dimethylamino)methylene]-3-oxopent-4-enenitrile (64.3 g, 333 mmol) and ammonium acetate (126 g, 1.66 mol) in EtOH (1.8 L) was heated at reflux for 60 h and concentrated to remove solvent. The resultant semi-solid residue was diluted with EtOAc, filtered and washed with EtOAc followed by CH2Cl2. The filtrate was evaporated to a reduced volume. The precipitated solids were collected by filtration, washed with EtOAc and a minimum amount of EtOH. The process of evaporation and crystallization was repeated to obtain more solid product from the mother liquor. The combined off-white solids provided 20.9 g of 4-hydroxynicotinonitrile (53%); melting range: 234-236° C.

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