(3S)-1-(5-bromopyrimidin-2-yl)-N-[(2,4-dichlorophenyl)methyl]pyrrolidin-3-amine → (S)-(2,4-Dichlorobenzyl)-[1-(5-methylpyrimidin-2-yl)-pyrrolidin-3-yl]-amine

Participants

Reaction Conditions

Reaction Steps

Add trimethylaluminium (2 N in hexanes, 190 μL, 0.32 mmol) and tetrakis(triphenylphosphine)palladium (0) (26 mg, 0.022 mmol) to (S)-[1-(5-bromopyrimidin-2-yl)-pyrrolidin-3-yl]-(2,4-dichlorobenzyl)-amine in dry THF (1.5 mL) and heat at 65° C. for 2 h, then add extra trimethylaluminium (2 N in hexanes, 190 μL, 0.32 mmol) and tetrakis(triphenylphosphine)palladium (0) (26 mg, 0.022 mmol) and heat at 65° C. for 30 min and 48 h at room temperature. Add water and extract with chloroform. Combine the organic layers and wash with saturated aqueous sodium chloride, dry (magnesium sulfate), concentrate and dissolve the residue in methanol (2 mL) and deposit onto an SCX-2 cartridge; eluting with methanol, then with 2 N ammonia in methanol. Concentrate the ammonia washing and chromatograph the residue by preparative mass guided chromatography to give the title compound as a residue. Treatment of the residue essentially as described in Example 1 gives the title compound as its hydrochloride. 1H NMR (300 MHz, CDCl3) δ 8.16 (2H, s), 7.37 (2H, dd, J=5.09, 3.01 Hz), 7.21 (1H, dd, J=8.29, 2.07 Hz), 3.90 (2H, d, J=4.90 Hz), 3.68-3.83 (2H, m), 3.58 (1H, m), 3.39-3.51 (2H, m), 2.14-2.25 (1H, m), 2.12 (3H, s), 1.84-1.96 (1H, m), MS (ES): m/z=337 [M+].

Provenance & Evidence