6-Bromophthalazine-1,4-diol, cas is 76240-49-8, it is a common heterocyclic compound, the phthalazine compound, its synthesis route is as follows.,76240-49-8
To a solution of 6-bromo-2,3-dihydrophthalazine-1,4-dione (CAS 76240-49-8, 36.0 g, 150 mmol) and Et3N (37.5 g, 375 mmol) in DCM (1.0 L) was added Tf20 (42.3 g, 150 mol) dropwise over 1 h. The mixture was stirred at 0 C for 2 h and then kept at 15 C for 16 h. The mixture was filtered and the filtrate was concentrated. The residue was purified by flash column(petroleum ether: EtOAc from 5:1 to 3:1) to give a mixture of the title compounds (9.0 g, 16% yield) as a white solid.
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Reference£º
Patent; F. HOFFMANN-LA ROCHE AG; HOFFMANN-LA ROCHE INC.; CUMMING, John G.; LIN, Xianfeng; LIU, Haixia; NAJERA, Isabel; QIU, Zongxing; SANDRIN, Virginie; TANG, Guozhi; WU, Guolong; (204 pag.)WO2018/1948; (2018); A1;,
Phthalazine – Wikipedia
Phthalazine | C8H6N2 – PubChem