Process for producing pyrazine compounds

Details Process for producing pyrazine compounds Process for producing pyrazine compounds

1996-07-23

1997-12-02

Shah, Mukund J.

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

Organic compounds

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

C07D24102

Patent

active

056938063

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.

REFERENCES:
patent: 4097478 (1978-06-01), Sato

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