反应详情

A small vial (2 ml) was charged with 3-[2-Amino-4-(4-difluoromethoxy-phenyl)-1-methyl-5-oxo-4,5-dihydro-1H-imidazol-4-yl]-benzaldehyde (27.9 mg, 77.6 □mol). To this was added half of a solution of isopropylamine (10 mg, 0.169 mmol) in methanol (1 ml). After stirring for two hours sodium borohydride (7.4 mg) was added, then after another 20 minutes 1N sodium hydroxide (1 ml) was added and the mixture extracted with diethyl ether. The ethereal layer was concentrated by rotary evaporation, diluted with methanol and re-concentrated (repeated three times). Finally the oily residue was redissolved in diethylether/hexanes and concentrated, twice then placed under vacuum to give a white foam 29 mg (93%) 1H NMR (400 MHz, DMSO-d6) δ ppm 0.92 (d, J=6.26 Hz, 6H) 1.63-1.68 (m, 1H) 2.59-2.63 (m, 1H) 2.93 (s, 3H) 3.57 (d, J=7.2 Hz, 2H) 6.60 (br. s., 2H) 7.05 (d, J=8.8 Hz, 2H) 7.12 (t, J=74.18 Hz, 1H) 7.15-7.18 (m, 2H) 7.22 (t, J=4.2 Hz, 1H) 7.35 (s, 1H) 7.42 (d, J=8.8 Hz, 2H); MS (ES) m/z 401.2 [M−H]−

1. additionwas added
2. extractionthe mixture extracted with diethyl ether
3. concentrationThe ethereal layer was concentrated by rotary evaporation
4. additiondiluted with methanol
5. concentrationre-concentrated (repeated three times)
6. dissolutionFinally the oily residue was redissolved in diethylether/hexanes
7. concentrationconcentrated