反应详情

温度

23 °C

To a suspension of 4-(4-(tert-butoxycarbonyl)piperazin-1-yl)-3-methylbenzoic acid (2.0 g, 6.24 mmol), methanamine hydrochloride (0.506 g, 7.49 mmol), N1-((ethylimino)methylene)-N3,N3-dimethylpropane-1,3-diamine hydrochloride (1.795 g, 9.36 mmol), and 1H-benzo[d][1,2,3]triazol-1-ol hydrate (1.434 g, 9.36 mmol) in DMF (Volume: 8.5 mL) was added 4-methylmorpholine (3.43 mL, 31.2 mmol) at 23° C. The reaction was stirred at 23° C. for 2 hr. The reaction mixture was diluted with water (100 mL) and the product was extracted with EtOAc (3×100 mL). The organic extracts were combined, washed with 1N HCl (50 mL), saturated NaHCO3 (50 mL), H2O (50 mL), brine (50 mL) dried over MgSO4, filtered, rinsed with EtOAc, and dried in vacuo to provide tert-butyl 4-(2-methyl-4-(methylcarbamoyl)phenyl)piperazine-1-carboxylate (1.90 g, 5.70 mmol, 91% yield) as a yellow oil. 1H NMR (400 MHz, DMSO-d6) δ ppm 1.42 (s, 9 H) 2.28 (s, 3 H) 2.75 (d, J=4.55 Hz, 3 H) 2.79-2.87 (m, 4 H) 3.42-3.52 (m, 4 H) 7.03 (d, J=8.34 Hz, 1 H) 7.62 (dd, J=8.34, 2.27 Hz, 1 H) 7.64-7.69 (m, 1 H) 8.26 (q, J=4.46 Hz, 1 H). ESI-MS: m/z 334.3 (M+H)+.

1. extractionthe product was extracted with EtOAc (3×100 mL)
2. washwashed with 1N HCl (50 mL), saturated NaHCO3 (50 mL), H2O (50 mL), brine (50 mL)
3. dry with materialdried over MgSO4
4. filtrationfiltered
5. washrinsed with EtOAc
6. customdried in vacuo