Water → HCID 59355290, compound

Participants

Reaction Steps

1,2-Dimethylhydrazine dihydrochloride (176 mg) and potassium carbonate (366 mg) were suspended in THF (8 mL) and 10 drops of water, 2-[5-bromo-2-(3-chloro-pyridin-2-yl)-2H-pyrazol-3-yl]-6-chloro-8-methyl-pyrido[3,2-d][1,3]oxazin-4-one (example 7, step 4) (300 mg) was added and the reaction mixture was stirred for 20 h at room temperature. Water and ethyl acetate were added, the layers were separated and the aqueous layer was 2× extracted with ethyl acetate. The combined organic layer was washed with brine, dried over magnesium sulfate and concentrated in vacuum. The residue was purified by column chromatography (silica 60, chloroform/ethyl acetate=1:1, Rf=0.13) to afford 300 mg of the title compound of the formula

Provenance & Evidence