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
A One-Pot Copper Catalyzed Biomimetic Route to <i>N</i>-Heterocyclic Amides from Methyl Ketones via Oxidative C–C Bond Cleavage
作者:Parthasarathi Subramanian、Satrajit Indu、Krishna P. Kaliappan
DOI:10.1021/ol5031266
日期:2014.12.5
A direct one-pot Cu-catalyzed biomimetic oxidation of methyl ketones to pharmaceutically important N-heterocyclic amides is reported. The scope of the method is broad, scalable, and mild, and the reaction is tolerant with various acid, base sensitive functionalities with multiple heteroatoms and aryl halides. The extensive mechanistic studies suggest that this reaction follows the Luciferin-Luciferase-like
Rapid and Selective in situ Reduction of Pyridine-N-oxides with Tetrahydroxydiboron
作者:Allyn Londregan、David Piotrowski、Jun Xiao
DOI:10.1055/s-0033-1340010
日期:——
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