1,2-Phenylenediamine dihydrochloride → 3-(1H-benzimidazol-2-yl)-butan-1-ol
반응식
Cl.Cl.[C:3]1([NH2:10])[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[NH2:9].[CH3:11][CH:12]1[CH2:17][CH2:16][O:15][C:13]1=O>Cl>[NH:9]1[C:4]2[CH:5]=[CH:6][CH:7]=[CH:8][C:3]=2[N:10]=[C:11]1[CH:12]([CH3:13])[CH2:17][CH2:16][OH:15]참가 물질
4
실험 절차
Following the general procedure described in A. R. Friedman, D. S. Payne and A. R. Day, J. Heterocyclic Chemistry, 3:257-259(1966), a mixture of 9 g of 1,2-phenylenediamine dihydrochloride and 7 g of 2-methylbutyrolactone in 60 mL of 4N hydrochloric acid was heated to reflux for 4 days, 1 teaspoon of decolorizing carbon added, and after another 15 min reflux, filtered hot. The filtrate was concentrated under reduced pressure to near dryness, the residue made basic (pH=8) with ammonium hydroxide and extracted into 3×100 mL of ethyl acetate. The combined extracts were dried over magnesium sulfate and concentrated under reduced pressure. After drying under vacuum, 12 g of 3-(1H-benzimidazol-2-yl)-butan-1-ol was obtained as a resin.