Diketene → Butanoic acid, 3-oxo-, 2-[4-(diphenylmethyl)-1-piperazinyl]ethyl ester

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Reaction Steps

Diketene (5.1 g) was added to 4-benzhydryl-1-piperazineethanol (18.1 g) and the mixture was heated at 70°-80° C. with stirring for 1.5 hours and purified by silica gel chromatography [eluent: hexane-ethyl acetate (3:2)] to give 2-(4-benzhydryl-1-piperazinyl)ethyl acetoacetate as an oil. Yield 17.1 g (73.6%).

Provenance & Evidence