Pyrazine 4-oxide derivatives and process for their preparation
AssigneeCarlo Erba S.p.A.
InventorsVittorio Ambrogi, Willy Logemann, Marc'Antonio Parenti, Raffaele Tommasini
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Abstract
Compounds of the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 are hydrogen, C.sub.1-6 alkyl or alkoxy, at least one of R.sup.1, R.sup.2 and R.sup.3 is other than hydrogen, R.sup.4 is carboxy, carbalkoxy or a carboxamide group, or a pharmaceutically acceptable salt when R.sup.4 is carboxy are disclosed.
Claims11
A compound of the formula ##STR5## wherein at least one of R.sub.1, R.sub.2 and R.sub.3 is C.sub.1-6 alkyl and the others are hydrogen atoms;
- each of R.sup.5 and R.sup.6, which may be the same or different, is hydrogen or C.sub.1-6 alkyl.
2-Carbamoyl-5-methylpyrazine 4-oxide.
2-Carbamoyl-5,6-dimethylpyrazine 4-oxide.
2-Carbamoyl-6-methylpyrazine 4-oxide.
2-(N,N-diethylcarbamoyl)-5-methylpyrazine 4-oxide.
2-(N-ethylcarbamoyl)-5-methylpyrazine 4-oxide.
Dependencies are inferred from the claim text.