Diisopropylethylamine → N-(4-(2-(4-(3-(3-tert-butyl-1-p-tolyl-1H-pyrazol-5-yl)ureido)naphthalen-1-yloxy)ethyl)pyridin-2-yl)-2-methoxyacetamide

Participants

Reaction Steps

To a suspension of 1-(4-(2-(2-aminopyridin-4-yl)ethoxy)naphthalen-1-yl)-3-(3-tert-butyl-1-p-tolyl-1H-pyrazol-5-yl)urea (Intermediate D) (35 mg, 0.065 mmol) in DCM (0.5 mL) was added DIPEA (23 μl, 0.131 mmol) and methoxyacetyl chloride (7 μl, 0.072 mmol). The mixture was stirred at RT, until judged to be complete by LC-MS; diluted with saturated aq NaHCO3 (1.5 mL) and the layers were separated through a phase separator cartridge. The organics were collected, evaporated under reduced pressure and the residue subjected to SCX capture and release. The resulting residue was purified further by preparative RP HPLC to give N-(4-(2-(4-(3-(3-tert-butyl-1-p-tolyl-1H-pyrazol-5-yl)ureido)naphthalen-1-yloxy)ethyl)pyridin-2-yl)-2-methoxyacetamide (Example 18) as a white solid (5 mg, 13%): m/z 607 (M+H)+ (ES+). 1H NMR (400 MHz, DMSO-d6) δ: 1.26 (9 H, s), 2.37 (3 H, s), 3.20 (2 H, t), 3.37 (3 H, s), 4.06 (2 H, s), 4.38 (2 H, t), 6.33 (1 H, s), 6.95 (1 H, d), 7.19 (1 H, dd), 7.33 (2 H, m), 7.42-7.47 (3 H, m), 7.54 (1 H, m), 7.59 (1 H, d), 7.87 (1 H, d), 8.12 (1 H, d), 8.18 (1 H, bs), 8.23 (1 H, d), 8.67 (1 H, s), 8.84 (1 H, s), 9.89 (1 H, s).

Provenance & Evidence