Preparation of alcohol-extended and amine-extended piperazines

Details Preparation of alcohol-extended and amine-extended piperazines Preparation of alcohol-extended and amine-extended piperazines

C - Chemistry, Metallurgy

07

D

260/267.1, 260/2

C07D 295/023 (2006.01) C07D 295/13 (2006.01)

Patent

CA 2029428

ABSTRACT A process for preparing alcohol-extended and amine-extended piperazines comprising contacting a difunctional aliphatic alcohol with a reactant amine, wherein at least one of the aliphatic alcohol or the reactant amine contains a piperazine moiety, in the presence of a catalyst containing a tungsten heteropoly acid. For example, monoethanolamine reacts with piper- azine in the presence of a 12-tungstophosphoric acid catalyst to yield predominately N-(2-aminoethyl)piper- azine, which is an amine-extended piperazine. 37,087-F

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