反应详情

To a solution of (5R,7R)-5-methyl-4-(piperazin-1-yl)-6,7-dihydro-5H-cyclopenta[d]pyrimidin-7-ol dihydrochloride (41 mg, 0.13 mmol) and 3-(tert-butoxycarbonyl(isopropyl)amino)-2-(4-chlorophenyl)propanoic acid (46 mg, 0.13 mmol) in DCM (10 mL) and triethylamine (1 mL) was added HBTU (51 mg, 0.13 mmol). The reaction mixture was stirred at room temperature for 1 hour. The solvent was removed and the residue was purified by silica gel chromatography, eluting with ethyl acetate-DCM/MeOH (20:1) to give tert-butyl 2-(4-chlorophenyl)-3-(4-((5R,7R)-7-hydroxy-5-methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-yl)piperazin-1-yl)-3-oxopropyl(isopropyl)carbamate (58 mg, 78%). 1H NMR (CDCl3, 400 MHz) δ 8.49 (s, 1H), 7.30-7.22 (m, 4H), 5.11 (m, 1H), 3.80-3.40 (m, 13H), 2.20-2.10 (m, 2H), 1.48 (s, 9H), 1.14 (m, 3H), 1.03 (m, 3H), 0.68 (m, 3H). MS (APCI+) [M+H] +559.

1. customThe solvent was removed
2. customthe residue was purified by silica gel chromatography
3. washeluting with ethyl acetate-DCM/MeOH (20:1)