Some common heterocyclic compound, 83-10-3, name is 1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazole-4-carboxylic acid, molecular formula is C12H12N2O3, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route. Recommanded Product: 83-10-3
Step 4) 4-(4-(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazole-4-carboxamido)-2,5-difluorophenoxy)picolinamide To a solution of 4-(4-amino-2,5-difluorophenoxy)picolinamide (200 mg, 0.76 mmol), and 1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazole-4-carboxylic acid (165 mg, 0.75 mmol) in DCM (10 mL) was added EDCI (175 mg, 0.93 mmol), and HOAT (26 mg, 0.15 mmol). The reaction was stirred at 45 C. for 16 hours, cooled to rt and diluted with EtOAc (20 mL). The solid was collected through filtration, dried at 45 C. in vacuo overnight to give the title compound as a white solid (230 mg, 63.7%). MS (ESI, pos. ion) m/z: 480.1 [M+H]+; 1H NMR (400 MHz, DMSO-d6): delta (ppm) 11.24 (s,1H), 8.53-8.57 (m, 2H), 8.15 (s, 1H), 7.75 (s, 1H), 7.53-7.59 (m, 4H), 7.44-7.45 (m, 3H), 7.24-7.25 (d, J=5.2 Hz, 1H), 3.43 (s, 3H), 2.70 (s, 3H).
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 83-10-3, its application will become more common.
Reference:
Patent; Sunshine Lake Pharma Co., Ltd.; Calitor Sciences, LLC; Xi, Ning; Wu, Yanjun; Liao, Min; Feng, Yanming; US2015/37280; (2015); A1;,
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