2-Mercapto-4-(trifluoromethyl)benzoic acid → tert-Butyl 3-[6-(4-oxo-7-trifluoromethyl-4H-1,3-benzothiazin-2-yl)-2-pyridyl]propanoate
反応式
[SH:1][C:2]1[CH:10]=[C:9]([C:11]([F:14])([F:13])[F:12])[CH:8]=[CH:7][C:3]=1[C:4]([OH:6])=O.[C:15]([C:17]1[N:22]=[C:21]([CH2:23][CH2:24][C:25]([O:27][C:28]([CH3:31])([CH3:30])[CH3:29])=[O:26])[CH:20]=[CH:19][CH:18]=1)#[N:16]>N1C=CC=CC=1>[O:6]=[C:4]1[C:3]2[CH:7]=[CH:8][C:9]([C:11]([F:14])([F:13])[F:12])=[CH:10][C:2]=2[S:1][C:15]([C:17]2[N:22]=[C:21]([CH2:23][CH2:24][C:25]([O:27][C:28]([CH3:31])([CH3:30])[CH3:29])=[O:26])[CH:20]=[CH:19][CH:18]=2)=[N:16]1参加物
4
実験手順
2-Mercapto-4-trifluoromethylbenzoic acid (1.59 g, 7.2 mmol) and tert-butyl 3-(6-cyano-2-pyridyl)propanoate (1.32 g, 5.7 mmol) were dissolved in pyridine (15 ml), and the mixture was refluxed for 15 hrs. The reaction mixture was concentrated under reduced pressure, subjected to a silica gel column chromatography, eluted with hexane-ethyl acetate (3:1, v/v) and recrystallized from ethyl acetate-hexane to give the titled compound (0.85 g, 34%).