Mechanistic Insights into Transition Metal-Catalysed Oxidation of a Hydroxamic Acid within situ Diels–Alder Trapping of the Acyl Nitroso Derivative
作者:Judith A. K. Howard、Gennadiy Ilyashenko、Hazel A. Sparkes、Andrew Whiting、Allen R. Wright
DOI:10.1002/adsc.200700568
日期:2008.4.7
New insights into the mechanism for the transition metal-mediated oxidation of hydroxamicacids to give intermediate acylnitroso species, with subsequent hetero-Diels–Alder trapping are presented. The activation of triphenylphosphine-ligated ruthenium-salen complexes is examined, and evidence is presented for the ruthenium-oxo species which are involved in the oxidative process of the hydroxamic acid
Copper-Catalyzed Aerobic Oxidation of <i>N</i>-Substituted Hydroxylamines: Efficient and Practical Access to Nitroso Compounds
作者:Charles P. Frazier、Alejandro Bugarin、Jarred R. Engelking、Javier Read de Alaniz
DOI:10.1021/ol301414k
日期:2012.7.20
A general and efficient aerobic oxidation of N-substituted hydroxylamines is described. The mild reaction conditions employed provide a catalytic and sustainable alternative to stoichiometric oxidation methods to gain access to a range of nitroso compounds, such as acylnitroso, nitrosoformate, nitrosoformamide, iminonitroso, arylnitroso, and P-nitrosophosphine oxide derivatives in excellent yield.