Water → HCID 86751876, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-(1',3'-dimethyl-pyrazol-5-yloxy)-pyridine-6-carboxylic acid (2.2 g, 9.6 mmol) (from Example 53) in anhydrous tetrahydrofuran (20 ml) was added carbonyldiimidazole (1.6 g, 10.6 mmol) and stirred for 30 minutes, maintaining the temperature up to 40° C. 3-fluoroaniline (1.1 ml, 10.6 mmol) was added and the reaction mixture heated to 50° C. After 2 hours, the clear mixture was poured into water (100 ml) and extracted three times with ethyl acetate (50 ml each). The combined extracts were dried with anhydrous magnesium sulphate and the solvent was removed in vacuo. The crude product was purified by flash silica gel column chromatography using hexane/ethyl acetate 1/1. The title compound was obtained as a white solid (1.7 g, 54%), mp 110° C.

Provenance & Evidence