Pyrrolidine → N-(4-((4-(3-(3-tert-butyl-1-p-tolyl-1H-pyrazol-5-yl)ureido)naphthalen-1-yloxy)methyl)pyridin-2-yl)-2-(pyrrolidin-1-yl)acetamide

Participants

Reaction Steps

To a solution of N-(4-((4-(3-(3-tert-butyl-1-p-tolyl-1H-pyrazol-5-yl)ureido)naphthalen-1-yloxy)methyl)pyridin-2-yl)-2-chloroacetamide (Intermediate B) (50 mg, 0.08 mmol) in DCM (1.0 mL), DMF (0.1 mL) and DIPEA (22 μl, 0.13 mmol) was added pyrrolidine (7.0 μl, 0.08 mmol). The reaction mixture was stirred at RT for 3 hr. LC-MS indicated 50% conversion to product. The reaction mixture was heated to 40° C. and stirred for 12 hr. LC-MS indicated 95% conversion to product. A further portion of pyrolidine (7.0 μl, 0.08 mmol) was added and the reaction mixture continued to stir at 40° C. for 5 hr. LC-MS indicated complete conversion to product. The crude reaction mixture was purified by column chromatography (12 g, 0-10% MeOH in DCM, gradient elution) to afford N-(4-((4-(3-(3-tert-butyl-1-p-tolyl-1H-pyrazol-5-yl)ureido)naphthalen-1-yloxy)methyl)pyridin-2-yl)-2-(pyrrolidin-1-yl)acetamide (Example 8) as a light orange solid (17 mg, 32%): m/z 632 (M+H)+ (ES+). 1H NMR (400 MHz, DMSO-d6) δ: 1.27 (9H, s), 1.76 (4H, m), 2.39 (3H, s), 2.62 (4H, m), 5.39 (2H, s), 6.35 (1H, s), 7.01 (1H, d), 7.28 (1H, d), 7.34 (2H, d), 7.44 (2H, d), 7.65-7.55 (3H, m), 7.92 (1H, d), 8.36-8.29 (3H, m), 8.58 (1H, s), 8.79 (1H, s), 9.93 (1H, s).

Provenance & Evidence