反应详情

A solution of 2-(3-(piperidin-4-ylidenemethyl)phenoxy)-5-(trifluoromethyl)pyridine hydrochloride (0.100 g; Example 1a, Step 5), phenyl 5-cyclopropyl-1,3,4-thiadiazol-2-ylcarbamate (0.085 g, 1.2 equiv), and triethylamine (0.045 mL, 1.2 equiv) in dimethyl sulfoxide (1 mL, 0.3 M) was heated to 65° C. for 2 h. The reaction was cooled to room temperature. Water was added and then the solution was extracted with ethyl acetate (2×). The organic extracts were dried over magnesium sulfate, filtered, and concentrated. The residue was purified on a 12 g silica gel column using 10-30% ethyl acetate/dichloromethane over 30 minutes as the eluent to give the title compound as a white foam. 0.057 g, 42% yield. 1H NMR (400 MHz, CDCl3) δ ppm 0.98-1.07 (2H, m), 1.09-1.18 (2H, m), 2.15-2.25 (1H, m), 2.46 (2H, t, J=5.5 Hz), 2.60 (2H, t, J=5.5 Hz), 3.66 (2H, t, J=5.8 Hz), 3.76 (2H, t, J=5.9 Hz), 6.40 (1H, s), 6.95-7.04 (3H, m), 7.09 (1H, d, J=7.8 Hz), 7.37 (1H, t, J=7.8 Hz), 7.89 (1H, dd, J=8.6, 2.7 Hz), 8.43 (1H, dd, J=1.6, 0.8 Hz).

1. extractionthe solution was extracted with ethyl acetate (2×)
2. dry with materialThe organic extracts were dried over magnesium sulfate
3. filtrationfiltered
4. concentrationconcentrated
5. customThe residue was purified on a 12 g silica gel column
6. customover 30 minutes