Methanol → HCID 14722453、化合物
反応式
Br[CH:2]1[C:7](=[O:8])[C:6]2[CH:9]=[C:10]([O:18][C:19]3[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=3)[C:11]([NH:13][S:14]([CH3:17])(=[O:16])=[O:15])=[CH:12][C:5]=2[O:4][CH2:3]1.[CH3:25][OH:26]>F[B-](F)(F)F.[Ag+]>[CH3:25][O:26][CH:2]1[C:7](=[O:8])[C:6]2[CH:9]=[C:10]([O:18][C:19]3[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=3)[C:11]([NH:13][S:14]([CH3:17])(=[O:16])=[O:15])=[CH:12][C:5]=2[O:4][CH2:3]1参加物
4
実験手順
There were mixed 4.12 g of 3-bromo-2,3-dihydro-7-methylsulfonylamino-6-phenoxy-4H-1-benzopyran-4-one, 9.37 g of silver tetrafluoroborate and 100 ml of methanol. The mixture was refluxed for 4 hours. The reaction mixture was cooled and filtered to remove the insolubles. The filtrate was subjected to distillation under reduced pressure to remove the solvent. The residue was purified by a column chromatography (eluant: a 5 : 1 mixture of toluene and ethyl acetate) to obtain 1.27 g (yield: 35%) of 2,3-dihydro-3-methoxy-7-methylsulfonylamino-6-phenoxy-4H-1-benzopyran-4-one.