反应详情

To a solution of potassium t-butoxide (0.073 g, 0.66 mmol) and t-butanol (0.5 mL) was added dropwise with stirring (2-bromo-pyridin-4-yl)-methanol (0.082 g, 0.44 mmol, prepared in the similar fashion as Example 16a from 2-Bromo-4-methyl-pyridine), followed by 3′-chloro-2,3,5,6-tetrahydro-[1,2′]bipyrazinyl-4-carboxylic acid (3,5-bis-trifluoromethyl-phenyl)-amide (0.100 g, 0.22 mmol; prepared in Example 16b). The mixture was stirred at room temperature overnight. LC/MS analysis indicated formation of the desired product. The mixture was concentrated in vacuo, and the crude product was purified on preparative HPLC to afford N-[3,5-bis(trifluoromethyl)phenyl]-4-(3-{[(2-bromopyridin-4-yl)methyl]-oxy}pyrazin-2-yl)piperazine-1-carboxamide (5 mg). 1H NMR (CDCl3) 8.40 (s, 1H), 7.95 (s, 2H), 7.8 (s, 1H), 7.6 (s, 1H), 7.58 (m, 2H), 7.24 (m, 1H), 6.62 (s, 1H), 5.4 (s, 2H), 3.6 (m, 4H), 1.6 (m, 4H) ppm.