Allylamine → N-allyl-2-chloro-7-(4-fluorophenyl)-7-methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-amine

Participants

Reaction Steps

To a solution of 2,4-dichloro-7-(4-fluorophenyl)-7-methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidine (Preparation U, 1.00 g, 3.37 mmol) in DCM (13.46 mL) was added DIPEA (1.176 ml, 6.73 mmol), then allylamine (0.303 ml, 4.04 mmol). The reaction solution was allowed to stir at rt. The reaction was concentrated in vacuo. The residue was applied to silica gel and eluted with a 0 to 50% EtOAc/Hexane gradient to afford N-allyl-2-chloro-7-(4-fluorophenyl)-7-methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-amine (896.2 mg, 2.82 mmol, 84% yield) as a white solid. LC-MS (M+H)+=316.2. 1H NMR (500 MHz, CDCl3) δ ppm 7.18-7.23 (2H, m), 6.91-6.98 (2H, m), 5.90-6.00 (1H, m), 5.26 (1H, dd, J=17.2, 1.4 Hz), 5.20 (1H, dd, J=10.1, 1.2 Hz), 4.62 (1H, br. s), 4.17 (1H, td, J=5.7, 1.7 Hz), 2.56-2.62 (2H, m), 2.43-2.50 (1H, m), 2.19-2.28 (1H, m), 1.63 (3H, s).

Provenance & Evidence