[OH:1][CH2:2][C@@H:3]1[CH2:11][N:6]2[CH2:7][CH2:8][NH:9][CH2:10][C@@H:5]2[CH2:4]1.Cl[C:13]1[CH:18]=[CH:17][C:16]([C:19]#[N:20])=[CH:15][N:14]=1.C(=O)([O-])[O-].[Na+].[Na+]>C(O)CC(C)C.C(OCC)(=O)C.O>[OH:1][CH2:2][C@@H:3]1[CH2:11][N:6]2[CH2:7][CH2:8][N:9]([C:13]3[CH:18]=[CH:17][C:16]([C:19]#[N:20])=[CH:15][N:14]=3)[CH2:10][C@@H:5]2[CH2:4]1A solution of 1.0 g (6.4 mmol) of (7S,8aS)-7-hydroxymethyl-1,2,3,4,6,7,8,8a-octahydro-pyrrolo[1,2-a]pyrazine (Preparation 13, Step A), 1.77 g (12.8 mmol) of 2-chloro-5-cyanopyridine and 2.71 g (25.6 mmol) of sodium carbonate in 50 mL of isoamyl alcohol was heated at reflux for 18 h. The mixture was cooled to room temperature, diluted with ethyl acetate and water, the pH was adjusted to 11 with sodium carbonate, the layers were separated, and the aqueous layer extracted with ethyl acetate. The combined organic phase was dried (magnesium sulfate), filtered and evaporated to give (7S,8aS)-7-hydroxymethyl-2-(5-cyanopyridin-2-yl)-1,2,3,4,6,7,8,8a-octahydro-pyrrolo[1,2-a]pyrazine.
読み込み中…
