With the rapid development and complex challenges of chemical substances, the synthesis of new drugs is usually one of the most effective ways to increase yield.628-13-7, name is Pyridinehydrochloride, molecular formula is C5H6ClN, molecular weight is 115.56, as common compound, the synthetic route is as follows.628-13-7
2-Amino-4-chloro-5-cyanopyridine (200 mg, 1.30 mmol, Production example 215-3) was dissolved in ethoxyethanol (13.0 ml); 5-aminoindole-1-carboxylic acid phenylamide (408 mg, 1.62 mmol, Production example 201-2) and pyridine hydrochloride (315 mg, 2.73 mmol) were added thereto; and the reaction mixture was heated and stirred at 130 C for 4 hours. After cooling to room temperature, the reaction mixture was partitioned between a saturated aqueous solution of sodium hydrogencarbonate and ethyl acetate; the organic layer was washed with brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (Fuji Silysia NH, hexane: ethyl acetate = 2: 3, ethyl acetate, ethyl acetate: methanol = 95: 5 in this order). The pale yellow oil obtained was solidified with diethyl ether; the crystals were suspended with diethyl ether, filtered off, washed with diethyl ether, and dried to yield the title compound (171 mg, 0.464 mmol, 35.7%) as colorless crystals.1H-NMR Spectrum (DMSO-d6) delta (ppm) : 5.77 (1H, s), 6.40 (2H, brs), 6.74 (1H, d, J=3.6 Hz), 7.13 (1H, t, J=7.6 Hz), 7.17 (1H, dd, J=2.4, 8.8 Hz), 7.38 (2H, t, J=7.6 Hz), 7.46 (1H, d, J=2.4 Hz), 7.64 (2H, d, J=7.6 Hz), 8.04 (1H, s), 8.05 (1H, d, J=3.6 Hz), 8.20 (1H, d, J=8.8 Hz), 8.35 (1H, s), 10.04 (1H, s).
Statistics shows that 628-13-7 is playing an increasingly important role. we look forward to future research findings about Pyridinehydrochloride.
Reference:
Patent; Eisai Co., Ltd.; EP1522540; (2005); A1;,
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem