反应详情

Pyrimidine-4-carbaldehyde (C12) (23.00 g, 212.8 mmol) was added to a mixture of tert-butyl 4-aminopiperidine-1-carboxylate (42.61 g, 212.8 mmol) in tert-butyl methyl ether (1.52 L). After 2.5 hours, the reaction was filtered, and the filtrate was concentrated in vacuo to provide an amber oil, which was generally taken directly to the following step. Yield: 56.30 g, 193.9 mmol, 91%. 1H NMR (400 MHz, CDCl3) partial spectrum, characteristic peaks: δ 1.49 (s, 9H), 7.95 (dd, J=5.2, 1.5 Hz, 1H), 8.36 (s, 1H), 8.81 (d, J=5.2 Hz, 1H), 9.28 (d, J=1.5 Hz, 1H).

1. filtrationthe reaction was filtered
2. concentrationthe filtrate was concentrated in vacuo
3. customto provide an amber oil, which