Hydrazine hydrate (1:1) → HCID 178424220, compound

Participants

Reaction Conditions

Reaction Steps

To a suspension of 4-hydroxy-3-(2-methylphenylacetyl)-1-(3-trifluoromethylphenyl)-1,8-naphthyridin-2(1H)-one (568 mg, 1.3 mmol) produced in Synthesis Example 36 in DMF (5.5 mL) was added hydrazine monohydrate (purity of 80%, 207 μL), and the mixture was stirred at 110 to 120° C. for 2 hours. To the reaction solution was added a sodium hydrogencarbonate aqueous solution. The resulting precipitate was separated by filtration, washed with water, and dried to give 3-(2-methylbenzyl)-5-(3-trifluoromethylphenyl)-1H-pyrazolo[4,3-c][1,8]-naphthyridin-4(5H)-one as a form of crystal (519 mg, yield 92%).

Provenance & Evidence