反应详情

5-(trifluoromethyl)pyridin-2-amine (100 mg, 617 μmol, Eq: 1.00), 3-chlorobenzaldehyde (86.7 mg, 70.2 μl, 617 μmol, Eq: 1.00) and p-toluenesulfonic acid monohydrate (35.2 mg, 185 μmol, Eq: 0.3) were dissolved in MeOH (1.00 mL) and the intensive yellow solution was stirred for 5 min. To this yellow solution was added dropwise 2-isocyanopropane (42.6 mg, 58.2 μL, 617 μmol, Eq: 1.00) and the corresponding yellow solution was stirred for 90 min. To the yellow solution was added dropwise water and oil was formed. The water/MeOH was separated from the oil and the yellow oily residue was purified by flash column chromatography (40 g SiO2, hexane/AcOEt 100:0 to 0:100) to yield a yellow solid (178 mg, 78.3%). MS: 354.0 [M+H]+; 1H-NMR (D6-DMSO): δ 8.92 (s, 1H), 8.29 (s, 1H), 8.19 (d, 1H), 7.72 (d, 1H), 7.51 (t, 1H), 7.47-7.36 (m, 2H), 5.13 (d, 1H), 3.26 (m, 1H), 1.08 (d, 6H).

1. stirringthe corresponding yellow solution was stirred for 90 min
2. customoil was formed
3. customThe water/MeOH was separated from the oil
4. customthe yellow oily residue was purified by flash column chromatography (40 g SiO2, hexane/AcOEt 100:0 to 0:100)