反应详情

To a solution of 5-ethyl-4-(piperazin-1-yl)-5,7-dihydrothieno[3,4-d]pyrimidine dihydrochloride (50 mg, 0.15 mmol) and (R)-2-(tert-butoxycarbonylamino)-3-(4-chlorophenyl)propanoic acid (46 mg, 0.15 mmol) in DCM (10 mL) and triethylamine (1 mL) was added HBTU (59 mg, 0.15 mmol). The mixture was stirred at room temperature for 3 hours. The solvent was removed and the residue was purified by silica gel chromatography, eluting with DCM/ethyl acetate (1:1) to give tert-butyl (R)-3-(4-chlorophenyl)-1-(4-(5-ethyl-5,7-dihydrothieno[3,4-d]pyrimidin-4-yl)piperazin-1-yl)-1-oxopropan-2-ylcarbamate (50 mg, 60%). 1H NMR (CDCl3, 400 MHz) δ 8.53 (s, 1H), 7.26-7.14 (m, 4H), 5.36 (m, 1H), 4.82 (m, 1H), 4.62 (m, 1H), 4.14 (m, 1H), 3.80-2.90 (m, 8H), 1.94 (m, 1H). 1.68 (m, 1H), 1.54 (m, 1H), 1.42 (s, 9H), 0.94 (m, 3H). MS (APCI+) [M+H]+ 533.

1. customThe solvent was removed
2. customthe residue was purified by silica gel chromatography
3. washeluting with DCM/ethyl acetate (1:1)