反应 #89012
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openreactiondata ↗doi:10.6084/m9.figshare.5104873.v1; patent:US04220646
反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.
实验步骤: The 1-chlorocarbonyl-4-propionylpiperazine used as starting material can be prepared as follows. Anhydrous piperazine (120 g.) and propionamide (m.p. 80° C., 102 g.) in anhydrous xylene (100 cm3) are heated under reflux for 48 hours in the presence of iodine (0.9 g.) to give 1-propionylpiperazine hydrochloride (153.0 g.), m.p. 165° C. 1-Propionylpiperazine is liberated from its hydrochloride by the action of an excess of ammonia in diethyl ether. The ammonium chloride formed is separated by filtration and the 1-propionylpiperazine is isolated by evaporation of the ether. can be prepared
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