2-Chlorobenzoxazole → HCID 58778873、化合物
反応式
Cl[C:2]1[O:3][C:4]2[CH:10]=[CH:9][CH:8]=[CH:7][C:5]=2[N:6]=1.[NH2:11][C:12]1[CH:17]=[CH:16][C:15]([CH2:18][C:19]([O:21][C:22]([CH3:25])([CH3:24])[CH3:23])=[O:20])=[CH:14][C:13]=1[CH3:26]>C1(C)C(C)=CC=CC=1>[O:3]1[C:4]2[CH:10]=[CH:9][CH:8]=[CH:7][C:5]=2[N:6]=[C:2]1[NH:11][C:12]1[CH:17]=[CH:16][C:15]([CH2:18][C:19]([O:21][C:22]([CH3:24])([CH3:23])[CH3:25])=[O:20])=[CH:14][C:13]=1[CH3:26]参加物
4
実験手順
In xylene (20 ml), 2-chlorobenzoxazole (845 μl, 7.40 mmol) and tert-butyl 4-amino-3-methylphenylacetate (1.26 g, 5.69 mmol) were heated under reflux for 2 hours under stirring. After cooling to room temperature, the reaction mixture was distilled under reduced pressure to remove the solvent. The residue was dissolved in chloroform/methanol (9:1, v/v, 100 ml). The resulting solution was washed with water, dried over anhydrous sodium sulfate, and distilled under reduced pressure to remove the solvent. The residue was purified by chromatography on a silica gel column, whereby from n-hexane/ethyl acetate (4:1, v/v) eluate fractions, tert-butyl (4-(2-benzoxazolyl)amino-3-methylphenyl)acetate (1.17 g, 61%) was obtained as a yellow amorphous substance.