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

1988-07-20

1991-01-08

Shen, Cecilia

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

544401, C07D29508, C07D29512

Patent

active

049837354

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 piperazine in the presence of a 12-tungstophosphoric acid catalyst to yield predominantly N-(2-aminoethyl)piperazine, which is an amine-extended piperazine.

REFERENCES:
patent: 4927931 (1990-05-01), Molzahn et al.

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