Triethylamine → HCID 13392138, compound

Participants

Reaction Steps

2 Grams of 5-(2-hydroxyethoxy)-3,4-dihydrocarbostyril and 2 ml of triethylamine were added to 50 ml of chloroform, then 1 g of diketene was added dropwise thereto, and the whole reaction mixture was stirred at room temperature for 2 days. The insoluble matter formed in the reaction mixture was removed by filtration, and the filtrate was concentrated, then the residue obtained was purified by silica gel column chromatography (eluant: chloroform), the eluate obtained was concentrated and the residue was recrystallized from chloroform-ether to yield 1.5 g of 5-(2-acetoacetoxyethoxy)-3,4-dihydrocarbostyril in the form of colorless needle-like crystals. Melting point: 134.5°-135.5° C.

Provenance & Evidence