反应详情

To a solution of 5-methylcyclohexane-1,3-diamine, 76a, (2.2 g, 17.2 mmol) in isopropyl alcohol (40 ml) and acetonitrile (40 ml) was added 2,4-dichloro-5-fluoropyrimidine (1.4 g, 8.6 mmol). The mixture was stirred at room temperature overnight, concentrated to dryness, and purified on silica gel eluted with 1-20% methanol/dichloromethane, to give 0.6 g of racemic N1-(2-chloro-5-fluoropyrimidin-4-yl)-5-methylcyclohexane-1,3-diamine: 1H NMR (300 MHz, MeOD) δ 7.85 (d, J=3.5 Hz, 1H), 4.07 (ddd, J=11.9, 7.9, 4.1 Hz, 1H), 3.54 (qd, J=11.3, 4.2 Hz, 1H), 2.82 (tt, J=11.4, 3.7 Hz, 1H), 2.16 (dd, J=15.0, 13.0 Hz, 1H), 1.89 (t, J=13.4 Hz, 2H), 1.50 (dd, J=76.0, 21.9 Hz, 2H), 1.10 (dt, J=17.9, 9.0 Hz, 1H), 0.99 (dd, J=8.5, 5.0 Hz, 3H), 0.81 (ddd, J=23.8, 12.0, 8.2 Hz, 1H); LCMS RT=1.24 (M+1) 259.1.

1. concentrationconcentrated to dryness
2. custompurified on silica gel
3. washeluted with 1-20% methanol/dichloromethane