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
Metal-Catalyzed Synthesis of Functionalized 1,2,4-Oxadiazoles from Silyl Nitronates and Nitriles
作者:Paul Nikodemiak、Ulrich Koert
DOI:10.1002/adsc.201601378
日期:2017.5.17
to 1,2,4‐oxadiazoles is described. Silver(I) triflate (AgOTf) and and ytterbium(III) triflate [Yb(OTf)3] are suitable catalysts. A variety of functional groups is tolerated in the nitrile. The reaction works well for alkenyl and aryl silyl nitronates while the use of alkyl silyl nitronates is less efficient. Mechanistic studies are in favour of an elimination of tert‐butyl(dimethyl)silanol (TBSOH) after