2-Bromopropane → (3-Chlorobenzyl)-(2-fluoro-9-isopropyl-9H-purin-6-yl)amine

関与物質

反応手順

To a stirred solution of (3-chloro-benzyl)-(2-fluoro-9H-purin-6-yl)-amine (0.6 g, 2.16 mmol) in dimethylformamide (10 ml) at room temperature under an argon atmosphere, was added powdered, anhydrous potassium carbonate (1.47 g, 5 eq, 10.8 mmol), followed by 2-bromopropane (2.2 ml, 10 eq, 21.6 mmol). The reaction mixture was stirred at room temperature for 24 h, when DCM:ether:MeOH (55:40:5), indicated that the reaction had gone to completion. The solvent was evaporated in vacuo and the residue partitioned between ethyl acetate (50 ml) and water (50 ml). The aqueous phase was extracted with more ethyl acetate (2×50 ml) and the combined organic phase washed with brine (50 ml), dried (MgSO4) and evaporated in vacuo. The residue was purified by silica gel flash column chromatography, eluted with CHCl3 to afford the title compound as a slightly yellow gum; Yield: 0.45 g (65%). δH (250 MHz, CDCl3) 1.57 (6H, d, J 7.5, CH[CH3]2), 4.81-4.63 (3 H, m, NHCH2Ar and CHMe2), 5.98 (1 H, s, br, NH), 7.29-7.19 (3 H, m, ArH), 7.34 (1 H, s, br, ArH), 7.42 (1 H, d, J 7.5, ArH), 7.51 (1 H, s, br, NH); δC (250 MHz, CDCl3) 161.93 (C), 156.37 (C), 156.05 (C), 141.33 (C), 140.42 (C), 137.75 (CH), 134.49 (C), 129.92 (CH), 127.69 (CH), 125.81 (CH), 125.64 (CH), 47.43 (CH), 43.82 (CH2), 22.56 (2×CH3); m/z 320.3 (M+H)

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