Adding a certain compound to certain chemical reactions, such as: 337915-79-4, name is 5-Bromo-N1-methylbenzene-1,2-diamine, belongs to bromides-buliding-blocks compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 337915-79-4, COA of Formula: C7H9BrN2
Example 30 4- ( (4-Chlorobenzyl) oxy) -1- (2-isopropyl-l-methyl-lH- benzimidazol-6-yl) pyridin-2 (1H) -one A) 6-Bromo-2-isopropy1-1-methyl-lH-benzimidazole To a solution of 5-bromo-Nx-methylbenzene-l, 2-diamine. (122 mg) and isobutyric acid (0.056 ml) in DMF (2 ml) was added HATU (242 mg) at room temperature. The mixture was stirred at room temperature under a dry atmosphere (CaCl2 tube) for 1 h. After being stirred, N, N-diisopropylethylamine (0.311 ml) was added to the reaction mixture. The mixture was stirred at room temperature for 1 h. The mixture was quenched with water and extracted with EtOAc. The organic layer was separated, washed with water and brine, dried over MgS04 and concentrated in vacuo. The resulting residue was stirred in AcOH (2.00 ml) at 90C for 1 h and at room temperature overnight. The mixture was quenched with saturated NaHCC>3 solution at room temperature and extracted with EtOAc. The organic layer was separated, washed with water and brine, dried over MgSC>4 and concentrated in vacuo. The residue was purified by NH silica gel column chromatography (hexane/EtOAc) to give the title compound (119 mg) as a pale yellow solid. MS (ESI+) : [M+H]+ 255.0.
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Reference:
Patent; TAKEDA PHARMACEUTICAL COMPANY LIMITED; KASAI, Shizuo; IGAWA, Hideyuki; TAKAHASHI, Masashi; MAEKAWA, Tsuyoshi; KAKEGAWA, Keiko; YASUMA, Tsuneo; KINA, Asato; AIDA, Jumpei; KHAMRAI, Uttam; KUNDU, Mrinalkanti; WO2013/105676; (2013); A1;,
Bromide – Wikipedia,
bromide – Wiktionary