Tetrahydrofuran → 4-Chloro-2-ethyl-3-pyridinamine

Participants

Reaction Steps

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)+.

Provenance & Evidence