反应详情

65 mg of 5-[(Z)-3-ethoxy-2-isopropoxy-3-oxo-1-propenyl]-2-methoxybenzoic acid and 37 mg of 4-(trifluoromethyl)benzylamine were dissolved in 1 ml N,N-dimethylformamide, and 33 μl diethyl cyanophosphonate and 30 μl triethylamine were added under ice-cooling. After stirring the reaction mixture at room temperature for 16 hours, it was poured into ice-water and extracted with ethyl acetate. The organic layer was successively washed with 1N hydrochloric acid and brine, dried over anhydrous magnesium sulfate and the solvent was evaporated. The residue was subjected to silica gel column chromatography, and from fractions eluted with hexane-ethyl acetate (5:1), 77 mg of ethyl (Z)-2-isopropoxy-3-[4-methoxy-3-({[4-(trifluoromethyl)benzyl]amino}carbonyl)phenyl]-2-propenoate was obtained.

1. temperaturecooling
2. extractionextracted with ethyl acetate
3. washThe organic layer was successively washed with 1N hydrochloric acid and brine
4. dry with materialdried over anhydrous magnesium sulfate
5. customthe solvent was evaporated
6. washfrom fractions eluted with hexane-ethyl acetate (5:1)