Hydrochloric Acid → Methyl 4-(benzoxazol-2-yl)benzoate
Reaktionsgleichung
[CH3:1][O:2][C:3](=[O:14])[C:4]1[CH:9]=[CH:8][C:7]([C:10](Cl)(Cl)Cl)=[CH:6][CH:5]=1.[NH2:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][C:17]=1[OH:22].Cl>>[C:3]([C:4]1[CH:9]=[CH:8][C:7]([C:10]2[O:22][C:17]3[CH:18]=[CH:19][CH:20]=[CH:21][C:16]=3[N:15]=2)=[CH:6][CH:5]=1)([O:2][CH3:1])=[O:14]Komponenten
4
Versuchsvorschrift
In the apparatus described in Example 1, 25.4 g of 4-trichloromethylbenzoic acid methyl ester (0.1 mol) and 10.9 g of 2-aminophenol (0.1 mol) were mixed and slowly heated up to 200° C, so that the stream of HCl that commences at 130° C would not become too strong. The total reaction time was about 4 hours. The ground reaction product was washed thrice with 100 ml of hot benzene and the combined and concentrated benzene phases where chromatographed through an Al2O3 : 8.9 g of raw product XVI, melting point 190°-191° C (35% of the theory), becoming 193°-194° C after recrystallization from benzene.