Hydrochloric Acid → 1-Isopropyl-4-[1-(4-cyclopropylcarbonylphenyl)-piperidine-4-carbonyl]-piperazine hydrochloride

関与物質

反応条件

反応手順

To 1-isopropyl-4-(piperidine-4-carbonyl)-piperazine (D1)(0.25 g) and cyclopropyl-4-fluorophenyl ketone (0.3 g), dissolved in DMSO (5 ml) was added potassium carbonate (0.37 g). The reaction was heated to 140° C. for 2 h. After cooling the mixture, the inorganics were filtered off. The filtrate was diluted with MeOH (20 ml) and then poured onto a 10 g isolute SCX column which was washed with MeOH (50 ml). The product was eluted with 10% ammonia in MeOH (50 ml), and then further purified by column chromatography [silica gel, step gradient 0-10% MeOH (containing 10% 0.88 ammonia solution) in DCM]. Fractions containing the required product were evaporated to give the free base which was dissolved in MeOH (4 ml) and treated with 1N HCl in diethyl ether (2 ml) to give the title compound (E105) as a solid (51mg). 1H NMR δ [DMSO-d6]: 0.93 (4H, m) 1.27 (6H, d, J=6.4 Hz), 1.5-1.8 (2H, m), 2.77-3.14 (7H, m), 3.38-3.48 (2H, m), 3.92-4.56 (4H, m), 6.98 (2H, d, J=9.2 Hz), 7.89 (2H, d, J=9.2 Hz), 10.6 (1H, br s). MS electrospray; (+ve ion) 384 (MH+).

情報源と証拠