CS([C:5]1[N:10]=[CH:9][C:8]2=[CH:11][CH:12]=[C:13]([C:14]3[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=3[O:20][CH3:21])[N:7]2[N:6]=1)(=O)=O.[C-]#N.[K+].[CH3:25][N:26]1CCCC1=O.CCOC(C)=O>CO.C(Cl)Cl>[CH3:21][O:20][C:15]1[CH:16]=[CH:17][CH:18]=[CH:19][C:14]=1[C:13]1[N:7]2[C:8]([CH:9]=[N:10][C:5]([C:25]#[N:26])=[N:6]2)=[CH:11][CH:12]=12-Methanesulfonyl-7-(2-methoxy-phenyl)-pyrrolo[2,1-f][1,2,4]triazine (804 mg, 2.65 mmol) and Potassium cyanide (311 mg, 4.77 mmol) in N-Methylpyrrolidinone (8.0 mL, 84 mmol) was stirred under an atmosphere of Nitrogen at 80° C. for 7 h, reaching ˜90% conversion. Work up by partitioning between 50% brine (40 mL):EtOAc (60 mL); giving an emulsion, so DCM (20 mL) was added. The emulsion did not successfully break, so it was kept with the aq. The aq. and emulsion was ext. with EtOAc (3×40 mL), the emulsion was isolated by itself and solubilized with DCM:MeOH. Combining all the org. layers, the mix. was washed with satd. NaHCO3 (50 mL) and brine (2×50 mL), dried over sodium sulfate (two iterations) then conc. in vacuo. Purify on silica gel (ISCO 40 g, 0-40% EtOAc:Hex) to afford 7-(2-Methoxy-phenyl)-pyrrolo[2,1-f][1,2,4]triazine-2-carbonitrile (0.480 g, 72%). 1H-NMR (CDCl3): 8.95 (s, 1H), 7.73 (m, 1H), 7.48 (m, 1H), 7.42 (d, 1H, J=4.7 Hz), 7.1-7.2 (m, 3H), 3.87 (s, 3H).
Wird geladen…
