Pyrazine oxide

Pyrazine -Oxides, their C-Alkyl and C-Aryl Derivatives... 

Less common methods of synthesis include nitrosation of suitable alkenes in acetonitrile solution (see Section 3.02.8.1.3(ii)) <84TLI319>, cyclization of iV-alkoxy ureas <87S1058>, and specific approaches to benzimidazole oxides from quinoxaline oxides, and to imidazole oxides from oxa-diazine and pyrazine oxides <93CHE127>. 

Reduction of pyrazine oxide by is inhibited by co-ordination to ruthenium(n) (43), and an expected net two-electron transfer using the internal and external... 

The A -oxides of pyrimidines have also been examined and compared with the pyridine A/-oxides by Wiley and Slaymaker [58] and by Katritzky [81]. The N->0 absorptions occur in the 1300—1255 cm" range and show the same sensitivity to substituent effects as the pyridine oxides. Pyrazine oxide absorbs at 1318 cm". ... 

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