[NH2:1][C:2]1[CH:3]=[CH:4][C:5]([C:9]([F:12])([F:11])[F:10])=[N:6][C:7]=1I.[CH3:13][N:14](C=O)C>[C-]#N.[Zn+2].[C-]#N.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[NH2:1][C:2]1[CH:3]=[CH:4][C:5]([C:9]([F:12])([F:11])[F:10])=[N:6][C:7]=1[C:13]#[N:14]12.5 g (0.434 mol, 1 eq) of 5-amino-6-iodo-2-(trifluoromethyl)pyridine was dissolved in 125 mL of dry DMF and degasified with nitrogen for 5 min. 6.1 g (0.519 mol, 1.2 eq) of zinc cyanide and 5 g (0.1 eq) of Pd(PPh3)4 were added and heated at 100° C. for over night. The reaction mixture was quenched with water and extracted with ethyl acetate. The organic layer was washed with brine and concentrated. The crude product obtained was purified by 60-120 silica gel using 15% of ethyl acetate in pet ether to get 7 g (86.31%) of pale yellow solid. 1H NMR (CDCl3, 400 MHz): 4.85 (2H, bs), 7.25 (1H, d), 7.62 (1H, d). MS 188 (M+H)+.
読み込み中…
