The synthetic route of 916325-85-4 has been constantly updated, and we look forward to future research findings.
Synthetic Route of 916325-85-4 , The common heterocyclic compound, 916325-85-4, name is 5-Bromo-1H-pyrazolo[3,4-b]pyridine-3-carboxylic acid, molecular formula is C7H4BrN3O2, its 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.
Compound Ic (1.0 g, 4.13 mrnol) and 3-(t°7?-butyl-dimethyl-si]anyloxymethyl)- benzene-l,2-diamine Compound 6a (1.05 g, 4.17 mmol), HATU (1.58 g, 4.16 mmol) EPO and DIPEA (2.5 mL, 35.9 mmol) in DMF (50 mL) was stirred at room temperature overnight. The solvent was removed and the residue was dissolved in ethyl acetate (100 mL), then sequentially washed with hydrochloric acid (20 mL, IM), water (30 mL x 3) and brine (20 mL). The organic solution was evaporated to dryness, in vacuo and purified by silica gel chromatography (10% to 50% of ethyl acetate in hexanes) to yield 5-bromo-lH-pyrazolo[3,4-b]pyridine-3-carboxylic acid [2-amino-3-(tert-butyl- dimethyl-silanyloxymethyl)-phenyl]-amide Compound 6b (1.21g, 61% yield) as a yellow powder. 1H NMR (300 MHz, CDCl3) delta 8.91 (d, IH, J = 2.1 Hz), 8.73 (s, IH), 8.67 (d, IH, 7 = 2.1 Hz), 7.47 (d, IH, 7 = 7.2 Hz), 7.01 (d, IH, 7 = 7.2 Hz), 6.83 (t, IH, J = 7.2 Hz), 4.78 (s, 2H), 0.95 (s, 9H), 0.11 (s, 6H); MS (ESI) m/z: 477 (M+H+).
The synthetic route of 916325-85-4 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; JANSSEN PHARMACEUTICA, N.V.; WO2006/130673; (2006); A1;,
Pyridine – Wikipedia,
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