反应详情

温度

100 °C

To a solution of (R)-4-chloro-5-methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidine (0.5 g, 3.0 mmol) in NMP (5 mL) were added (S)-tert-butyl 3-methylpiperazine-1-carboxylate (0.59 g, 3 mmol) and diisopropylethylamine (0.52 mL). The mixture was heated to 100° C. for 6 hours. The mixture was cooled and diluted with ethyl acetate (200 mL) and washed with water (6×100 mL). The organic phase was dried and concentrated. The residue was purified by silica gel chromatography, eluting with Hexane/ethyl acetate (1:1) to give (S)-tert-butyl 3-methyl-4-((R)-5-methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-yl)piperazine-1-carboxylate (0.186 g, 19%). 1H NMR (CDCl3, 400 MHz) δ 8.46 (s, 1H), 4.66 (m, 1H), 4.30-3.80 (m, 3H), 3.47 (m, 1H), 3.20 (m, 1H), 3.20-2.80 (m, 4H), 2.22 (m, 1H), 1.70 (m, 1H), 1.49 (s, 9H), 1.29 (m, 3H), 1.17 (m, 3H). MS (APCI+) [M+H]+333.

1. temperatureThe mixture was cooled
2. washwashed with water (6×100 mL)
3. customThe organic phase was dried
4. concentrationconcentrated
5. customThe residue was purified by silica gel chromatography
6. washeluting with Hexane/ethyl acetate (1:1)