Trifluoroacetic acid → 6-Fluoro-2-methyl-3-((3S,9aS)-octahydropyrazino[2,1-c][1,4]oxazin-3-yl)benzonitrile 2,2,2-trifluoroacetate
Reaktionsgleichung
[C:1]([C:3]1[C:4]([CH3:27])=[C:5]([C@@H:10]2[O:15][CH2:14][C@@H:13]3[CH2:16][N:17](C(OC(C)(C)C)=O)[CH2:18][CH2:19][N:12]3[CH2:11]2)[CH:6]=[CH:7][C:8]=1[F:9])#[N:2].[C:28]([OH:34])([C:30]([F:33])([F:32])[F:31])=[O:29]>>[F:31][C:30]([F:33])([F:32])[C:28]([OH:34])=[O:29].[F:9][C:8]1[C:3]([C:1]#[N:2])=[C:4]([CH3:27])[C:5]([C@@H:10]2[O:15][CH2:14][C@@H:13]3[CH2:16][NH:17][CH2:18][CH2:19][N:12]3[CH2:11]2)=[CH:6][CH:7]=1Komponenten
3
Versuchsvorschrift
tert-Butyl (3S,9aS)-3-(3-cyano-4-fluoro-2-methylphenyl)hexahydropyrazino[2,1-c][1,4]oxazine-8(1H)-carboxylate (1.88 g, 5.01 mmol) was treated with 10 mL TFA at RT for 1 h. The TFA was then removed under reduced pressure to yield the title compound. LC-MS: M+1=276: 1H-NMR (600 MHz, DMSO) δ ppm 7.954 (dd, J=8.7, 6.25 Hz, 1H), 7.412 (t, J=8.85 Hz, 1H), 4.939 (dd, J=8.4, 2.75 Hz, 1H), 3.848 (d, J=11.8 Hz, 1H), 3.762 (b, 1H), 3.189-3.536 (m, 8H), 3.072 (d, J=12 Hz, 1H), 2.485 (s, 3H).