Continuous Platform To Generate Nitroalkanes On-Demand (in Situ) Using Peracetic Acid-Mediated Oxidation in a PFA Pipes-in-Series Reactor
作者:Sergey V. Tsukanov、Martin D. Johnson、Scott A. May、Stanley P. Kolis、Matthew H. Yates、Jeffrey N. Johnston
DOI:10.1021/acs.oprd.8b00113
日期:2018.8.17
of peroxides and nitroalkanes. The subsequent continuous extraction generates a solution of purified nitroalkane, which can be directly used in the following enantioselective aza-Henry chemistry to furnish valuable chiral diamine precursors with high selectivity, thus completely avoiding isolation of the potentially unsafe low-molecular-weight nitroalkane intermediate. A continuous campaign (16 h) established
Deoximation of Oximes with 2-Iodylbenzoic Acid in Water in the Presence of β-Cyclodextrin
作者:K. Rama Rao、N. Srilakshmi Krishnaveni、K. Surendra、Y. V. Nageswar
DOI:10.1055/s-2003-41448
日期:——
Oximes of various aldehydes and ketones can be converted to the corresponding carbonyl compounds at room temperature in impressive yields with 2-iodylbenzoic acid in water in the presence of β-cyclodextrin.
Highly regioselective nitrile oxide dipolar cycloadditions with ortho-nitrophenyl alkynes
作者:Melissa L. McIntosh、Michael R. Naffziger、Bradley O. Ashburn、Lev N. Zakharov、Rich G. Carter
DOI:10.1039/c2ob26267c
日期:——
The dipolar cycloadditions of ortho-nitrophenyl alkynes with aryl nitrileoxides has been demonstrated. A range of substituents are tolerated on the alkyne. These reactions proceed with excellent levels of regioselectivity. Subsequent functionalization of the isoxazole scaffold has been demonstrated.
Electrochemical Synthesis of Isoxazolines: Method and Mechanism
作者:Samuel D. L. Holman、Alfie G. Wills、Neal J. Fazakerley、Darren L. Poole、Diane M. Coe、Leonard A. Berlouis、Marc Reid
DOI:10.1002/chem.202103728
日期:2022.3
Isoxazolines without the [3+2]: An electrochemical method for the synthesis of isoxazoline cores is presented. Both aryl and more challenging alkyl aldoximes are converted to the desired isoxazoline through an electrochemically enabled regio- and diastereoselective reaction with electron-deficient alkenes. Supporting analyses from kinetic (time-course) modelling and density functional theory support
In Situ Generation of Nitrile Oxides from NaCl–Oxone Oxidation of Various Aldoximes and Their 1,3-Dipolar Cycloaddition
作者:Guodong Zhao、Lixin Liang、Chi Ho Ethan Wen、Rongbiao Tong
DOI:10.1021/acs.orglett.8b03829
日期:2019.1.4
generation of nitrileoxides through NaCl/Oxone oxidation of aldoximes and their dipolar cycloaddition. The key feature is the use of a green chemistry approach to address the substrate scope of aldoximes: broad scope (aliphatic, aromatic, and alkenyl aldoximes) without production of organic byproducts derived from oxidant and/or catalyst. Importantly, NaCl/Oxone-promoted three-component cycloaddition of aldehyde