반응 #72601

반응 방정식

4-(4-(tert-butoxycarbonyl)piperazin-1-yl)-3-methylbenzoic acid

methanamine hydrochloride

N1-((ethylimino)methylene)-N3,N3-dimethylpropane-1,3-diamine hydrochloride

1H-benzo[d][1,2,3]triazol-1-ol hydrate

4-methylmorpholine

→

tert-butyl 4-(2-methyl-4-(methylcarbamoyl)phenyl)piperazine-1-carboxylate

수율 91.3%

용매

DMF

water

반응 조건

후처리

1. 1
   추출the product was extracted with EtOAc (3×100 mL)
2. 2
   세척washed with 1N HCl (50 mL), saturated NaHCO3 (50 mL), H2O (50 mL), brine (50 mL)
3. 3
   건조dried over MgSO4
4. 4
   여과filtered
5. 5
   세척rinsed with EtOAc
6. 6
   기타dried in vacuo

실험 절차

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)+.

출처