Process for manufacturing pyrazines

Details Process for manufacturing pyrazines Process for manufacturing pyrazines

1988-12-29

1990-10-30

Shen, Cecilia

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

Organic compounds

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

C07D24112

Patent

active

049669702

ABSTRACT:
Pyrazines having the formula (I) ##STR1## wherein R is H, methyl, or ethyl are prepared by passing a hydrogen stream containing corresponding diamines having the formula (II) ##STR2## wherein R is same as previously defined, over a copper-chromite catalyst which has been once reduced at 300.degree.-450.degree. C. in a hydrogen-containing stream.

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Appl. Catal., 29 (1987) 161-174.

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