[F:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]=[CH:9][N+:10]([O-])=O)=[CH:4][C:3]=1[F:13].[H-].[Al+3].[Li+].[H-].[H-].[H-]>C1COCC1.CCOCC>[F:13][C:3]1[CH:4]=[C:5]([CH2:8][CH2:9][NH2:10])[CH:6]=[CH:7][C:2]=1[F:1]To a solution of 1,2-difluoro-4-(2-nitro-vinyl)benzene (1.5 g) in THF (50 mL) is added dropwise lithium aluminum hydride (23 mL, 1M in ether) and the solution is heated at 40° C. for 3 hours. The solution is cooled, diluted with ether and quenched with Na2SO4.10H2O (104 g) overnight. The solid is filtered, and the solution is evaporated in vacuo and chromatographed on silica gel eluting with EtOAc to afford 2-(3,4-difluoro-phenyl)-ethylamine (0.81 g). MS: 170 (M+H); 1H NMR (300 MHz, CDCl3) □6.9-7 (3H, m); 2.95 (2H, t); 2.7 (2H, t).
Wird geladen…
