1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 1-{1-[1-(1-Methyl-cyclopropanecarbonyl)-piperidin-4-yloxy] isoquinolin-4-yl}-3-[5-(1-methyl-cyclopropyl)-2-p-tolyl-2H-pyrazol-3-yl]-urea

Participants

Reaction Steps

Place EDCI (0.147 g, 0.77 mmol), HOBt (0.10 g, 0.77 mmol), 1-[5-(1-methyl-cyclopropyl)-2-p-tolyl-2H-pyrazol-3-yl]-3-[1-(piperidin-4-yloxy)-isoquinolin-4-yl]-urea dihydrochloride (Preparation 3, 0.16 g, 0.64 mmol) and 1-methyl-1-cyclopropyl carboxylic acid (1.1 eq) in a flask under N2. Add dichloromethane (5 mL) follow by DIPEA (0.22 mL, 1.28 mmol) and stir at room temperature overnight. Evaporate solvent to give a residue. Subject residue to silica gel chromatography eluting with hexane:AcOEt 50-100% to give 1-{1-[1-(1-methyl-cyclopropanecarbonyl)-piperidin-4-yloxy]-isoquinolin-4-yl}-3-[5-(1-methyl-cyclopropyl)-2-p-tolyl-2H-pyrazol-3-yl]-urea as a free base. ES+ (m/z) 579.3 (M+H).

Provenance & Evidence