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- W2091707098 abstract "The present work envisages an eco-friendly route for N-oxidation of heterocycles and selective mono N-oxidation of substituted pyrazines in good yields using 30% dilute H2O2 as an oxidant together with redox molecular sieves (TS-1, Ti–ZSM-5 (30), Ti–MCM-41) as catalysts in aqueous and non-aqueous medium as solvent. The TS-1 catalyst is shown good activity and selectivity in N-oxidation of substituted pyridines and pyrazines except –cyano substituted pyridines and pyrazines. The activity has been enhanced with TS-1 catalyst in aqueous medium in comparison with non-aqueous medium as solvent when electron-withdrawing groups are present. The solid catalysts displayed consistent activity for several cycles." @default.
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- W2091707098 date "2002-07-01" @default.
- W2091707098 modified "2023-10-12" @default.
- W2091707098 title "An efficient synthesis of heterocyclic N-oxides over molecular sieve catalysts" @default.
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- W2091707098 doi "https://doi.org/10.1016/s1381-1169(02)00059-6" @default.
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