Hydrazine hydrate (1:1) → HCID 136359760, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 7-bromo-4-chloro-2-oxo-1,2-dihydroquinoline-3-carbaldehyde (8.0 g, 27.9 mmol) in 150 mL of DMF at 80° C. is added hydrazine hydrate (2 mL, 33.5 mmol) at 80° C. The reaction medium is stirred for 24 hours at 80° C. and then cooled to room temperature and filtered. The solid obtained is washed with diisopropyl ether and dried to give 5.3 g of 7-bromo-1,5-dihydro-4H-pyrazolo[4,3-c]quinolin-4-one in the form of a pale yellow powder (yield: 72%).

Provenance & Evidence