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US 4,289,881 AGranted
Process for the preparation of 1,4-diazabicyclo-(2,2,2)-octane
AssigneeBayer Aktiengesellschaft
InventorsLaszlo Imre, Walter Horstmann, Hans-Gerhard Leopold
Life of this patent
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Abstract
A process for the preparation of 1,4-diazobicyclo-(2,2,2)-octane by contacting piperazine with a catalyst at an elevated temperature, the catalyst containing silicon dioxide.
Claims10
A process for the preparation of 1,4-diazabicyclo-(2,2,2)-octane which comprises contacting a piperazine compound of the formula ##STR3## wherein R.sup.1 denotes the hydroxyl group or the amino group and
- R.sup.2 represents hydrogen or the radical
- --A--R.sup.3
- wherein
- A denotes a straight-chain or branched hydrocarbon radical and
- R.sup.3 denotes the hydroxyl group or the amino group, at a temperature in the range from 200.degree. to 500.degree. C. with a catalyst containing at least 97 percent by weight free silicon dioxide.
2 more elements
Dependencies are inferred from the claim text.