反应详情

5-(trifluoromethyl)pyridin-2-amine (100 mg, 617 μmol, Eq: 1.00), 3-ethynylbenzaldehyde (84.3 mg, 648 μmol, Eq: 1.05) 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 2 h. Upon addition of water a yellow precipitate was formed. The solid was filtered off, washed with MeOH/water (1:1) and dried under vacuum to yield the product as a yellow solid (153 mg, 72.2%). MS: 344.0 [M+H]+; 1H-NMR (D6-DMSO): δ 8.90 (s, 1H), 8.36 (s, 1H), 8.25 (d, 1H), 7.71 (d, 1H), 7.50 (t, 1H), 7.46-7.39 (m, 2H), 5.10 (d, 1H), 4.24 (s, 1H), 3.25 (m, 1H), 1.08 (d, 6H).

1. stirringthe corresponding yellow solution was stirred for 2 h
2. customwas formed
3. filtrationThe solid was filtered off
4. washwashed with MeOH/water (1:1)
5. customdried under vacuum