Heterocyclic Communications p. 221 - 224 (2003)
Update date:2022-08-17
Topics:
Sooter, Joseph A.
Marshall, Tadd P.
McKay, Scott E.
Chlorinated pyrazines are directly oxidized to the N-oxides using dimethyldioxirane. The reactions were found to be completely regioselective and the products were easily isolated in good yields. These oxidations were comparable to the conversion of methylated pyrazines to pyrazine monoxides and dioxides described by us in part 1. Oxidation with dimethyldioxirane in acetone overcomes problems associated with the isolation of hydrophilic pyrazine N-oxides obtained by using other oxidation reagents.
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