Oxidation of Azides by the HOF·CH<sub>3</sub>CN: A Novel Synthesis of Nitro Compounds
作者:Mira Carmeli、Shlomo Rozen
DOI:10.1021/jo060440u
日期:2006.6.1
aromatic rings, ketones, nitriles, halides, alcohols, and esters are tolerated. Sulfides react with HOF·CH3CN usually at the same rate as azides. Amines and olefins, however, react faster, so they have to be protected first. Nitro derivatives with various oxygen isotopes can be made using the labeled H18OF·CH3CN. In the case of chiral azides the stereochemistry around the nitrogen-bonded carbons is retained
The nitroaldol (Henry) reaction of 2-oxoaldehydes with a variety of nitroalkanes, under basic heterogeneous conditions and microwave irradiation, affords 1,2-diketones in a one-pot way.
A base-free, recyclable approach for the conjugate addition of aliphaticnitro compounds to enones to give γ-nitro ketones is presented. Reactions are carried out in an ionic liquid with a basic anionic moiety, such as BmimNTf2, as the solvent, under mild conditions (25 °C for 24 h). The IL medium could be recycled several times without any appreciable loss of activity, after a simple extraction procedure