[OH-:1].[Na+].[F:3][C:4]([F:21])([F:20])[C:5]1[CH:6]=[CH:7][C:8]([O:11][C:12]2[CH:19]=[CH:18][C:15]([CH:16]=[O:17])=[CH:14][CH:13]=2)=[N:9][CH:10]=1>[N+]([O-])([O-])=O.[Ag+]>[F:21][C:4]([F:20])([F:3])[C:5]1[CH:6]=[CH:7][C:8]([O:11][C:12]2[CH:19]=[CH:18][C:15]([C:16]([OH:1])=[O:17])=[CH:14][CH:13]=2)=[N:9][CH:10]=1To aq. NaOH (3.2 g, 80 mmol) was added silver nitrate (3.4 g, 40 mmol) and stirred for 10 min., then the mixture was cooled to 0° C. and the above aldehyde (4.62 g, 17 mmol) was added. The mixture was stirred overnight, then filtrate through celite. The filtrate was collected and acidified with conc. HCl. The solid was collected by filtration and dried under vacuum to give 4-(5-trifluoromethyl-pyridin-2-yloxy)-benzoic acid. (3.5 g)
Wird geladen…