3-Amino-4-cyclopropyl-but-2-enoic acid ethyl ester → 2-Cyclopropylmethyl-6-(4-trifluoromethoxy-phenyl)-4-trifluoromethyl-nicotinic acid ethyl ester
Reaction equation
[CH2:1]([O:3][C:4](=[O:12])[CH:5]=[C:6]([NH2:11])[CH2:7][CH:8]1[CH2:10][CH2:9]1)[CH3:2].[F:13][C:14]([F:32])([F:31])/[C:15](/O)=[CH:16]/[C:17]([C:19]1[CH:24]=[CH:23][C:22]([O:25][C:26]([F:29])([F:28])[F:27])=[CH:21][CH:20]=1)=O>C(#N)C>[CH2:1]([O:3][C:4](=[O:12])[C:5]1[C:15]([C:14]([F:13])([F:32])[F:31])=[CH:16][C:17]([C:19]2[CH:24]=[CH:23][C:22]([O:25][C:26]([F:27])([F:28])[F:29])=[CH:21][CH:20]=2)=[N:11][C:6]=1[CH2:7][CH:8]1[CH2:9][CH2:10]1)[CH3:2]Participants
4
Procedure
231 mg (1.4 mmol) 3-Amino-4-cyclopropyl-but-2-enoic acid ethyl ester were added to a solution of 819 mg (2.7 mmol) (Z)-4,4,4-trifluoro-3-hydroxy-1-(4-trifluoromethoxy-phenyl)-but-2-en-1-one in 2.7 ml acetonitrile. The mixture was heated under reflux conditions for 12 h, the solvent was removed under reduced pressure and the residue purified by flash chromatography (silica gel, heptane/AcOEt) to give 242 mg (0.56 mmol, 41%) of the title compound as yellow oil.