Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 94805-51-3, name is 2-Oxo-1,2-dihydropyridine-4-carbonitrile. This compound has unique chemical properties. The synthetic route is as follows. HPLC of Formula: C6H4N2O
2-Hydroxy-4-cyano-pyridine (240 mg, 2 mmol, 1 equiv.) was dissolved in DMF (6 ml), K2CO3 (415 mg, 3 mmol, 1.5 equiv.) and NaI (60 mg, 0.4 mmol, 0.2 equiv.) were added and the mixture was stirred at r.t. for 10 min. 5-Chloro-2-(chloromethyI)-1,3- benzothiazole (436 mg, 2 mmol, 1 equiv.) was added and the reaction mixture was stirred at 600C for 3 h and at r.t. overnight. By addition of H2O, brown solid precipitated, which was filtered, rinsed with H2O, dried and re-crystallised from CH3CN. Yield 280 mg (46%), mp 224-227C, HPLC-MS (method 1): m/z 302 [M+H]+, Rt = 3.80 min. By 13C-NMR analysis it was identified to be the N-alkylated derivative (Scheme 24). The DMF-H2O mother liquors were evaporated to dryness under reduced pressure and the residue was purified by column chromatography on silica, eluted with EtOAc/hexane (10%-100% gradient) to give 45 mg (7.5% yield) of a brown solid, HPLC-MS (method 1): m/z 302 [M+H]+, Rt = 4.86 min. By 13C-NMR analysis, it was identified to be the desired O-alkylated derivative (Scheme 24).
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Reference:
Patent; PROLYSIS LTD; WO2007/107758; (2007); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem