反应详情

A solution of trans-(2-amino-cyclohexyl)-carbamic acid tert-butyl ester (Tetrahedron Lett. 2000, 41, 9607; 400 mg, 1.87 mmol) and 2,5-dimethoxy-3-tetrahydrofurancarboxaldehyde (365 mg, 2.05 mmol) in pyridine (0.5 mL) and acetic acid (0.82 mL) was heated at 100° C. for 4.5 h. After cooling, the reaction mixture was partitioned between ethyl acetate and 10% aq. citric acid solution. The organic layer was washed with brine, dried (MgSO4), and evaporated. Chromatography (SiO2, heptane-ethyl acetate gradient) yielded the title compound (334 mg, 61%). Off-white solid, MS (ISP) 293.3 (M+H)+.

1. temperatureAfter cooling
2. customthe reaction mixture was partitioned between ethyl acetate and 10% aq. citric acid solution
3. washThe organic layer was washed with brine
4. dry with materialdried (MgSO4)
5. customevaporated