Electric Literature of 1207625-18-0, A common heterocyclic compound, 1207625-18-0, name is 3-Chloro-7H-pyrrolo[2,3-c]pyridazine, molecular formula is C6H4ClN3, 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.
[D] B-bromo-3-chloro-7H-pyrrolo [2 3-c] pyridazine[0253][0254]To a stirred solution of 3-chloro-7H-pyrrolo [2 3-c] pyridazine (1.9 g 12.4 mmol) in DMF (15 mL) was added NBS (2.2 g 13 mmol) and the resulting reaction mixture was stirred at 30for 2 h. After cooling to room temperature the reaction mixture was diluted with water and extrated with EtOAc (20 mL three times) . The combined organics were washed with brine dried over anhydrous Na2SO4 filtered and concentrated in vacuo to give a crude product which was purified by silica gel flash chromatography (petroleum etherEtOAc 201 to 41) to afford the title compound (1.9 g 65.9yield) as a light yellow solid MS 234.1 [M+H]+.
The synthetic route of 1207625-18-0 has been constantly updated, and we look forward to future research findings.
Reference:
Patent; SAVIRA PHARMACEUTICALS GMBH; EUROPEAN MOLECULAR BIOLOGY LABORATORY; TAN, Xuefei; CUMMING, John Graham; LIU, Yongfu; WU, Jun; WANG, Lisha; SHEN, Hong; SHI, Tianlai; (90 pag.)WO2017/133665; (2017); A1;,
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