Synthesis of Nitroalkanes from Alkylhalides under Mild and Nonaqueous Conditions by Using Polymer Supported Nitrites
作者:Mohammad Ali Karimi Zarchi、Amin Zarei
DOI:10.1002/jccs.200500047
日期:2005.4
Alkyl halides are efficiently converted to their corresponding nitroalkanesundermild and nonaqueousconditions by usingpolymersupportednitrites. The polymeric reagent is regenerable.
Chiral Pool/Henry/Enzymatic Routes to Acetogenin Synthons
作者:Wesam Qayed、Frederick Luzzio
DOI:10.2174/1570178612666150819194241
日期:2015.10.6
Enantiospecific and enantioselective approaches to the natural (16R,19R)- and the unnatural
(16S,19S)- THF core of the bioactive acetogenin annonacin are described which utilizes both a chiral
pool synthesis and enzymatic transformations. In the antipodal (2S,5S) THF series derived from D-
(+)-glucosamine, the semi-protected THF aldehyde synthon allows for two-directional synthetic
elaboration through a Henry reaction with a lipid-like nitroalkane. The resulting nitroalcohol having
the unnatural (2S,5S)-THF core was oxidized to the corresponding -nitroketone using a modified
Collins oxidation. The intermediate -nitroketone has potential for the preparation of the C15-C32 core and analogues
through subsequent removal of the nitro group and reduction of the carbonyl.
Sequential Continuous Flow Processes for the Oxidation of Amines and Azides by using HOF⋅MeCN
作者:Christopher B. McPake、Christopher B. Murray、Graham Sandford
DOI:10.1002/cssc.201100423
日期:2012.2.13
The generation and use of the highly potent oxidising agent HOF⋅MeCN in a controlled single continuousflowprocess is described. Oxidations of amines and azides to corresponding nitrated systems by using fluorine gas, water and acetonitrile by sequential gas–liquid/liquid–liquid continuousflow procedures are reported.
Ozone-Mediated Amine Oxidation and Beyond: A Solvent-Free, Flow-Chemistry Approach
作者:Eric A. Skrotzki、Jaya Kishore Vandavasi、Stephen G. Newman
DOI:10.1021/acs.joc.1c00768
日期:2021.10.15
Ozone is a powerful oxidant, most commonly used for oxidation of alkenes to carbonyls. The synthetic utility of other ozone-mediated reactions is hindered by its high reactivity and propensity to overoxidize organic molecules, including most solvents. This challenge can largely be mitigated by adsorbing both substrate and ozone onto silica gel, providing a solvent-free oxidation method. In this manuscript
Facile Reduction of Nitroarenes into Anilines and Nitroalkanes into Hydroxylamines<i>via</i>the Rapid Activation of Ammonia⋅ Borane Complex by Supported Gold Nanoparticles
作者:Eleni Vasilikogiannaki、Charis Gryparis、Vasiliki Kotzabasaki、Ioannis N. Lykakis、Manolis Stratakis
DOI:10.1002/adsc.201200983
日期:2013.3.25
Goldnanoparticlessupported on titania catalyse, even at a ppm loading level, the quantitative reduction of nitroarenes into anilines and nitroalkanes into alkylhydroxylamines by the ammonia⋅ boranecomplex. No dehalohalogenation was seen in the case of chloro‐ or bromonitroarenes, while ester, cyano, or carboxylic acid functionalities also remain intact. The nitroarene to anilinereduction pathway