反应详情

To a solution of 1-(methoxycarbonyl)-2-(2-((2-(trimethylsilyl)ethoxy)methyl)-7-methyl-2H-indazol-5-yl)ethyl 4-nitrophenyl carbonate (0.859 mmol) was added 3-(piperidin-4-yl)quinolin-2(1H)-one-hydrochloride (682 mg, 2.58 mmol), in one portion, followed by dropwise addition of diisopropylethylamine (0.37 mL, 2.15 mmol) at room temperature. The resulting yellow suspension was stirred at room temperature overnight. The mixture was extracted with ethyl acetate (2×2 mL) and the organic phase was washed with brine and dried over sodium sulfate. The crude product was purified using preparative HPLC to afford (R)-1-methoxy-3-(7-methyl-2-((2-(trimethylsilyl)ethoxy)methyl)-2H-indazol-5-yl)-1-oxopropan-2-yl 4-(2-oxo-1,2-dihydroquinolin-3-yl)piperidine-1-carboxylate (157 mg, 30%). Mass spec. 619.24 (MH+). 1H-NMR (CDCl3, 400 MHz) δ 8.0 (s, 1H), 7.53 (br s, 2H), 7.47-7.43 (m, 1H), 7.34-7.31 (m, 1H), 7.21-7.18 (m, 1H), 6.96 (s, 1H), 5.7 (s, 2H), 5.23 (dd, J=8.6, 4.6 Hz, 1H), 4.28 (br s, 2H), 3.74 (s, 3H), 3.61 (m, 2H), 3.13 (m, 3H), 2.93 (m, 2H), 2.59 (s, 3H), 1.94 (m, 2H), 0.92 (m, 2H), −0.064 (s, 9H).

1. extractionThe mixture was extracted with ethyl acetate (2×2 mL)
2. washthe organic phase was washed with brine
3. dry with materialdried over sodium sulfate
4. customThe crude product was purified