Ethylenediamine → N1-(2-chloro-7-(4-fluorophenyl)-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-yl)ethane-1,2-diamine

Participants

Reaction Steps

To a solution of 2,4-dichloro-7-(4-fluorophenyl)-6,7-dihydro-5H cyclopenta[d]pyrimidine (0.5 g, 1.77 mmol) in acetonitrile (5 mL) was added diisopropylethylamine (0.343 g, 2.659 mmol) followed by ethane-1,2-diamine (0.138 g, 2.30 mmol) at room temperature. The reaction mixture was stirred at room temperature for 18 h. The solvent was removed under reduced pressure and the residue was taken in dichloromethane (5 mL) and silica (1 g). The resultant slurry of the compound on silica was subjected to flash chromatography using a Teledyne Isco instrument (12 g RediSep silica column, 10% methanol in chloroform) to get the title compound N1-(2-chloro-7-(4-fluorophenyl)-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-yl)ethane-1,2-diamine (0.35 g, 64.5%) as a dark brown solid. LC-MS (M+H)+=307.2. 1H NMR (400 MHz, CDCl3) δ ppm 7.11-7.08 (2H, m), 6.99-6.95 (2H, m), 5.40 (1H, br s), 4.25-4.22 (1H, m), 3.61-3.57 (2H, m), 2.99-2.98 (2H, m), 2.78-2.62 (3H, m), 2.10-2.09 (1H, m).

Provenance & Evidence