2-(2-Bromoethoxy)-4-nitrobenzonitrile → 2-(2-(2-(2-chloro-7-(4-fluorophenyl)-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-ylamino)ethylamino)ethoxy)-4-nitrobenzonitrile

Participants

Reaction Steps

To a solution of N1-(2-chloro-7-(4-fluorophenyl)-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-yl)ethane-1,2-diamine {Preparation Sc Step (1), 1.0 g, 3.265 mmol} in DMF (5 mL) was added TEA (0.495 g, 4.89 mmol) followed by 2-(2-bromoethoxy)-4-nitrobenzonitrile (Preparation N, 1.05 g, 3.91 mmol) at room temperature. The reaction mixture was stirred at rt 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 in silica was subjected to flash chromatography using a Teledyne Isco instrument (12 g RediSep silica column, 10% methanol in chloroform) to get 2-(2-(2-(2-chloro-7-(4-fluorophenyl)-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-ylamino)ethylamino)ethoxy)-4-nitrobenzonitrile (0.35 g, 21.7%) as a light yellow solid. LC-MS (M+H)+=497.2. 1H NMR (400 MHz, CDCl3) δ ppm 7.93-7.91 (1H, d, J=6.8 Hz), 7.90 (1H, s), 7.86-7.85 (1H, m), 7.12-7.00 (2H, m), 6.98-6.96 (2H, m), 5.30 (1H, br s), 4.34-4.32 (2H, m), 4.26-4.24 (1H, m), 3.70-3.66 (2H, m), 3.21-3.19 (2H, m), 3.04-3.02 (2H, m), 2.78-2.63 (3H, m), 1.99-1.98 (1H, m).

Provenance & Evidence