Method of producing N,N'-(dimethyl) piperazine compounds

Details Method of producing N,N'-(dimethyl) piperazine compounds Method of producing N,N'-(dimethyl) piperazine compounds

1975-12-19

1978-01-03

Coughlan, Jr., Paul M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D29502, C07D24138

Patent

active

040666492

ABSTRACT:
An improved process for producing N,N'-(dimethyl) piperazine compounds is disclosed wherein monoethanolamine or a C-lower alkyl substituted primary 1-amino-2-alkanol is contacted with methyl alcohol in the presence of a catalytically effective amount of a phosphorous-containing substance at a temperature of about 150.degree. C. to about 350.degree. C. under a pressure sufficient to maintain the mixture essentially in liquid phase, said N,N'-(dimethyl) piperazine compounds produced having the formula: ##STR1## wherein each R is independently hydrogen or a lower alkyl radical, and, recovering from the resultant reaction mixture said N,N'-(dimethyl) piperazine.

REFERENCES:
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patent: 2839533 (1958-06-01), Scigliano et al.
patent: 3112317 (1963-11-01), Marschall et al.
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patent: 3342820 (1967-09-01), Brader
patent: 3383417 (1968-05-01), Lichtenwaltey
patent: 3429909 (1969-02-01), Schuster
patent: 3647795 (1972-07-01), Bluestein et al.
patent: 3766184 (1973-10-01), Johansson et al.

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