Application of 139512-70-2,Some common heterocyclic compound, 139512-70-2, name is 4-Chloro-5-fluorobenzene-1,2-diamine, molecular formula is C6H6ClFN2, 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.
To a mixture of N-[(5-chloro-2-oxo-1,3-benzothiazol-3(2H)-yl)acetyl]-N-methylglycine (150 mg), 4-chloro-5-fluorobenzene-1,2-diamine (81 mg), and DMF (5 mL) were added HOBt (77 mg) and WSC.HCl (107 mg), followed by stirring at room temperature overnight. The reaction mixture was diluted with EtOAc, and washed with water, a saturated aqueous NaHCO3 solution, and brine in this order, dried over Na2SO4, and then concentrated under reduced pressure. To the residue was added acetic acid (5 mL), followed by heating and stirring at 110 C. for 5 hours. The reaction mixture was cooled to room temperature and concentrated under reduced pressure. The residue was diluted with EtOAc. The organic layer was washed with a saturated aqueous NaHCO3 solution and brine in this order, dried over Na2SO4, and then concentrated under reduced pressure. The obtained solid was washed with EtOAc and then with MeOH, and suspended in MeOH (3 mL). 4 M hydrogen chloride/EtOAc (120 muL) was added thereto, followed by stirring at room temperature for 1 hour. The resulting solid was collected by filtration and then washed with MeOH to obtain N-[(6-chloro-5-fluoro-1H-benzimidazol-2-yl)methyl]-2-(5-chloro-2-oxo-1,3-benzothiazol-3(2H)-yl)-N-methylacetamide hydrochloride (146 mg).
These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 4-Chloro-5-fluorobenzene-1,2-diamine, its application will become more common.
Reference:
Patent; ASTELLAS PHARMA INC.; Shiraki, Ryota; Tobe, Takahiko; Kawakami, Shimpei; Moritomo, Hiroyuki; Ohmiya, Makoto; US2014/315963; (2014); A1;,
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