These common heterocyclic compound, 126069-70-3, name is 2-(Trifluoromethyl)-5,6,7,8-tetrahydroimidazo[1,2-a]pyrazine, 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. Quality Control of 2-(Trifluoromethyl)-5,6,7,8-tetrahydroimidazo[1,2-a]pyrazine
The title compound was prepared from 2-(trifluoromethyl)-5,6,7,8-tetrahydroimidazo[1,2-a]pyrazine (277 mg, 1.45 mmol, from Example 1, Step B), (3R)-3-[(1,1-dimethylethoxycarbonyl)amino]-4-(2,5-difluorophenyl)butanoic acid (Intermediate 1, 416 mg, 1.32 mmol), DIPEA (226 mg, 1.58 mol), HOBT (216 mg, 1.98 mol) and HATU (753 mg, 1.98 mol) in DMF (6 mL), using a procedure analogous to that described in Example 1 Step C, except for the purification method. The compound was purified by preparative TLC (silica gel, 20% hexane in ethyl acetate, then 10% methanol in dichloromethane) to give 360 mg of the title compound as a foamy solid. 1H NMR (500 MHz, CDCl3) delta 1.35 (s, 9H), 2.62 (m, 2H), 2.88 (m, 2H) 3.88-4.16 (m, 5H), 4.73 (s, 1H), 4.85 (m, 1H) 5.26-5.39 (m, 1H) 6.90 (bs, 1H), 7.06 (m, 2H), 7.24 (m, 1H). ESI-MS 489 (M+1)
The synthetic route of 2-(Trifluoromethyl)-5,6,7,8-tetrahydroimidazo[1,2-a]pyrazine has been constantly updated, and we look forward to future research findings.
Reference:
Patent; Merck Sharp & Dohme Corp.; Edmondson, Scott D.; Fisher, Michael H.; Kim, Dooseop; Maccoss, Malcolm; Parmee, Emma R.; Weber, Ann E.; Xu, Jinyou; US2015/359793; (2015); A1;,
Pyrazine – Wikipedia,
Pyrazine | C4H4N2 – PubChem