Triethylamine → 1-(5-Coumaranyl carbonyl)-4-(2-thiazolyl) piperazine

Participants

Reaction Conditions

Reaction Steps

To a solution of 9 g of 1-(2-thiazolyl) piperazine and 5 g of anhydrous triethylamine in 200 ml of anhydrous tetrahydroduran, there were added dropwise, a solution of 9.1 g of 5-coumaranyl carboxylic acid chloride in 20 ml of tetrahydrofuran. After the completion of the addition, the reaction mixture was heated at 60° C for two hours, then, the so-formed precipitate was suction-filtered off. The filtrate was evaporated under reduced pressure and the crystalline residue was washed with water then recrystallized in 70 ml of ethanol. There were obtained 12 g of 1-(5-coumaranyl carbonyl)-4-(2-thiazolyl) piperazine, melting (K) at 150°-151° C.

Provenance & Evidence