Methyl iodide → HCID 22281998, compound

Participants

Reaction Steps

A mixture of 5-amino-4-(2-methoxyphenoxy)-1-methyl-1,2dihydro-3H-pyrazol-3-one (Preparation 69) (300 mg), caesium carbonate (1.25 g) and iodomethane (200 mg) in dry dimethylformamide (5 ml) was stirred under a nitrogen atmosphere for 24 hours at room temperature. The reaction mixture was partitioned between ethyl acetate (7×25 ml) and water (40 ml) and the combined organic extracts were dried (magnesium sulfate) and concentrated under vacuum. The residue was purified by chromatography on a Biotage Flash™ 40s silica cartridge (40 g silica) using neat ethyl acetate and then 1% methanol/dichloromethane as eluants to give the title compound as a brown solid (90 mg), Rf 0.57 (10% methanol/dichloromethane).

Provenance & Evidence