Acetic Anhydride → HCID 23471620, compound

Participants

Reaction Steps

To a solution of 5-(5-methyl-3-oxo-2,3,4,5-tetrahydropyridazin-6-yl)indoline in 100 ml of chloroform was added 5 ml of triethylamine with stirring. To the mixture was added dropwise 3 ml of acetic anhydride. After maintaining at room temperature for one hour, the reaction mixture was concentrated under reduced pressure. The residual crystals were filtered off, washed with water and recrystallized from ethanol to give 4.3 g of 5-(5-methyl-3-oxo-2,3,4,5-tetrahydropyridazin-6-yl)-1-acetylindoline as white crystals, melting at 258°-261° C.

Provenance & Evidence