反应详情

1-Chloro-N,N-dimethylethenamine (38 μL, 0.36 mmol) was added to a stirred solution of (R)-2-methoxypropionic acid (37 mg, 0.36 mmol) in DCM (1.0 mL) and the resulting solution was stirred at RT for 1 hr. The solution was added dropwise to a stirred mixture of 1-(4-((2-aminopyridin-4-yl)methoxy)naphthalen-1-yl)-3-(3-tert-butyl-1-p-tolyl-1H-pyrazol-5-yl)urea (Intermediate A) (75 mg, 0.14 mmol) and DIPEA (75 μL, 0.43 mmol) in DCM (2.0 mL) at 0° C. Stirring was continued for a further 48 hr. The mixture was poured in to 1% NH3 in MeOH (20 mL) and stirred for 1 hr, and evaporated in vacuo to give a yellow residue. Column chromatography (12 g, 20-50% EtOAc in iso-hexane) gave (R)—N-(4-((4-(3-(3-tert-butyl-1-p-tolyl-1H-pyrazol-5-yl)ureido)naphthalen-1-yloxy)methyl)pyridin-2-yl)-2-methoxypropanamide (Example 5) as a light pink solid (39 mg, 43%): m/z 607 (M+H)+ (ES+). 1H NMR (400 MHz, DMSO-d6) δ: 1.27 (9H, d), 1.30 (3H, s), 2.39 (3H, s), 3.31 (3H, s), 4.02 (1H, q), 5.39 (2H, s), 6.35 (1H, s), 7.02 (1H, d), 7.29 (1H, dd), 7.35 (2H, m), 7.45 (2H, m), 7.56-7.64 (3H, m), 7.93 (1H, m), 8.30-8.37 (3H, m), 8.58 (1H, s), 8.79 (1H, s), 10.09 (1H, s).

1. stirringStirring
2. waitwas continued for a further 48 hr
3. stirringstirred for 1 hr
4. customevaporated in vacuo
5. customto give a yellow residue