Diisopropylethylamine → HCID 68540874, compound

Participants

Reaction Steps

Heat a solution of 4-(4-amino-pyridin-2-yloxy)-piperidine-1-carboxylic acid tert-butyl ester (Preparation 20, 1 g, 3.41 mmol), (5-tert-butyl-2-p-tolyl-2H-pyrazol-3-yl)-carbamic acid 2,2,2-trichloro-ethyl ester (Preparation 38, 1.38 g, 3.41 mmol), and diisopropylethylamine (1.2 mL, 6.82 mmol) in DMSO (15 mL) at 60° C. for 5 d. Cool the resulting mixture to room temperature and partition between water and ethyl acetate using saturated aq. sodium chloride solution to aid phase separation. Extract the aqueous layer with ethyl acetate, wash the combined organic layers twice with water, dry over sodium sulfate and concentrate under reduced pressure. Subject residue to silica gel chromatography eluting with a gradient of ethyl acetate in dichloromethane to give 877 mg (43% yield) of 4-{4-[3-(5-tert-butyl-2-p-tolyl-2H-pyrazol-3-yl)-ureido]-pyridin-2-yloxy}-piperidine-1-carboxylic acid tert-butyl ester. LCMS ES+(m/z) 549 [M+H].

Provenance & Evidence