反应详情

Following the same procedure to synthesize 1-(2-amino-1H-benzo[d]imidazol-6-yl)-1H-pyrrole-2,5-dione hydrochloride, tert-butyl 6-amino-2-(bis(tert-butoxycarbonyl)amino)-1H-benzo[d]imidazole-1-carboxylate (0.300 g, 0.669 mmol) was reacted with 4,4-dimethyldihydro-2H-pyran-2,6(3H)-dione (0.095 g, 0.669 mmol) to give the title product (0.202 g, 98% yield) as a yellow solid. 1H NMR (300 MHz, CD3OD) δ 7.86 (s, 1H), δ 7.28 (s, 2H), δ 2.49 (s, 2H), δ 2.39 (s, 2H), δ 1.15 (s, 6H) ppm; 13C NMR (75 MHz, CD3OD) 174.8, 171.7, 151.2, 134.9, 129.8, 126.1, 116.4, 111.3, 103.8, 45.4, 33.1, 27.2 ppm; HRMS (ESI) Calcd for C14H16N4O2 (M+) 272.1273. Found 272.1282.