反应详情

A mixture of 4-(4-chloromethyl-thiazol-2-yl)-piperidine-1-carboxylic acid tert-butyl ester (549 mg), 4-tetrazol-1-yl-phenol (270 mg), Cs2CO3 (890 mg) in acetonitrile was heated under reflux overnight. After cooling, the reaction mixture was filtered through a pad of celite, concentrated in vacuo. Purification by chromatography (40-100% EtOAc/Hexanes) gave the desired product as a white solid. 1H NMR (CDCl3): δ 8.01 (1H, s), 7.61 (2H, d, J=8.8 Hz), 7.25 (1H, s), 7.15 (2H, d, J=8.8 Hz), 5.22 (2H, s), 4.2 (2H, br), 3.17 (1H, m), 2.87 (2H, m), 2.11 (2H, m), 1.73 (2H, m), 1.46 (9H, s).

1. temperaturewas heated
2. temperatureunder reflux overnight
3. temperatureAfter cooling
4. filtrationthe reaction mixture was filtered through a pad of celite
5. concentrationconcentrated in vacuo
6. customPurification by chromatography (40-100% EtOAc/Hexanes)