Sodium Carbonate → 5,11-dihydro-11-[3-(4-prenyl-1-piperazinyl)-propionyl]-6H-pyrido-[2,3-b][1,4]-benzodiazepine-6-one

Participants

Reaction Steps

A mixture of 6.6 g of 11-(3-chloropropionyl)-5,11-dihydro-6H-pyrido-[2,3-b][1,4]-benzodiazepine-6-one, 2.56 g of sodium carbonate and 4.0 g of 1-prenylpiperazine was refluxed in 90 ml of absolute ethanol for 2 hours. Then, the reaction mixture was vacuum filtered while still hot and the filtrate was evaporated to a volume of about 20 ml. The crystallized precipitate was vacuum filtered and the product was crystallized from isopropanol to obtain a 62% yield of 5,11-dihydro-11-[3-(4-prenyl-1-piperazinyl)-propionyl]-6H-pyrido-[2,3-b][1,4]-benzodiazepine-6-one melting at 199°-201° C.

Provenance & Evidence