Rapid and Selective in situ Reduction of Pyridine-N-oxides with Tetrahydroxydiboron
摘要:
Pyridine-N-oxides are often used as reactive precursors in the syntheses of substituted pyridines. Isolation and subsequent reduction of the associated pyridine-N-oxide intermediates can be challenging. We have discovered that tetrahydroxydiboron functions as a mild, versatile, and remarkably selective reducing agent for pyridine-N-oxides and may be used in an in situ fashion, thus obviating the isolation of N-oxide-containing intermediates
Rapid and Selective in situ Reduction of Pyridine-N-oxides with Tetrahydroxydiboron
摘要:
Pyridine-N-oxides are often used as reactive precursors in the syntheses of substituted pyridines. Isolation and subsequent reduction of the associated pyridine-N-oxide intermediates can be challenging. We have discovered that tetrahydroxydiboron functions as a mild, versatile, and remarkably selective reducing agent for pyridine-N-oxides and may be used in an in situ fashion, thus obviating the isolation of N-oxide-containing intermediates
Displacement of 2-or 4-chloropyridine N-oxides, with nitrogen nucleophiles, under solvent-free conditions offers a simple route to scarce N-substituted pyridine N-oxides.
Itai; Seikijima, Eisei Shikenjo hokoku. Bulletin of National Institute of Hygienic SciencesChem.Abstr., 1956, vol. 74, p. 121