Process for producing pyrazine compounds
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United States of America Patent
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Dec 2, 1997
Grant Date -
N/A
app pub date -
Jul 23, 1996
filing date -
Aug 4, 1995
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Abstract
A process for producing a pyrazine compound of the general formula (3): ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 represent a hydrogen atom or a lower alkyl group, which comprises catalytically reacting in a gaseous phase a diamine compound of the general formula: ##STR2## with a diol compound of the general formula: ##STR3## in the presence of a catalyst containing hydrogen-treated silver or a catalyst containing silver and at least one element selected from the group consisting of alkali metals, alkaline earth metals, zinc and lanthanoid elements.
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