Hydrocarbostyril → 6-(4-Chlorobutyryl)-3,4-dihydrocarbostyril

Participants

Reaction Steps

120 Milliliters of γ-chlorobutyryl chloride and 160 g of pulverized anhydrous aluminium chloride were suspended in 300 ml of carbon disulfide. The suspension was refluxed by heating and another suspension of 29.4 g of 3,4-dihydrocarbostyril in 100 ml of carbon disulfide was added dropwise to the first suspension in 1 hour and the reaction was continued for 4 hours under refluxing condition by heating. After the reaction was completed, the reaction mixture was poured into ice-water and the precipitates thus formed were collected by filtration, washed with water and with ether. Then the washed precipitates were recrystallized from acetone to obtain 25.5 g of 6-(4-chloro-1-oxobutyl)-3,4-dihydrocarbostyril in yellow needle-like crystals. Melting point: 158°-160° C.

Provenance & Evidence