CC1[N:3]([C:8]2[N:13]=[CH:12][C:11]([CH:14]([OH:17])[CH2:15][CH3:16])=[CH:10][CH:9]=2)C(C)=CC=1.Cl.NO.[CH2:21](O)[CH3:22]>O>[NH2:3][C:8]1[CH:9]=[CH:10][C:11]([CH:14]([O:17][CH2:21][CH3:22])[CH2:15][CH3:16])=[CH:12][N:13]=1To a solution of 1.07 g of 1-[6-(2,5-dimethylpyrrol-1-yl)pyridin-3-yl]propan-1-ol in 20 mL of ethanol heated to 80° C. is added a solution of 1.94 g of hydroxylamine hydrochloride in 1.6 mL of water, and the mixture is stirred for 24 hours at 80° C. After cooling to room temperature, the reaction medium is filtered and concentrated to dryness. The residue is purified by flash chromatography on a column of 100 g of silica, eluting with 400 mL of dichloromethane, then with 300 mL of ethyl acetate and then with a 95/5 mixture of dichloromethane and methanol. The fractions containing the expected product are combined and concentrated under vacuum to give 0.186 g of 2-amino-5-(1-ethoxypropyl)pyridine in the form of a brown oil.
불러오는 중…
