Tetrahydrofuran → 4-Chloro-2-ethylpyridin-3-amine

반응식

Br[C:2]1[C:7]([NH2:8])=[C:6]([Cl:9])[CH:5]=[CH:4][N:3]=1.C[Al](C)C.[CH2:14]1COC[CH2:15]1>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>[Cl:9][C:6]1[CH:5]=[CH:4][N:3]=[C:2]([CH2:14][CH3:15])[C:7]=1[NH2:8]

참가 물질

실험 절차

Following a modified synthetic procedure reported in J. Org. Chem. 2006, 71, 7322, a to a stirred solution of 2-bromo-4-chloropyridin-3-amine (prepared as described in US2002/0119982) (1.0 eq.), and Pd(Ph3P)4 (0.05 eq.) in dry THF (0.05M) under argon was added dropwise Me3Al (1.0M in hexane, 2.0 eq.) and the reaction mixture was refluxed for O/N. The volatiles were removed under reduced pressure and the crude product was purified by flash chromatography eluting with 5-100% EtOAc/petroleum ether affording the titled compound as orange oil. 1H NMR (300 MHz, DMSO-d6, 300K) δ 7.67 (1H, d, J=5.2 Hz), 7.11 (1H, d, J=5.2 Hz), 5.26 (2H, br. s), 2.69 (2H, q, J=7.3 Hz), 1.73 (3H, t, J=7.3 Hz). MS (ES) C7H9ClN2 requires: 156, found: 157, 159 (M+H)+.