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
Unprecedented formation of Δ2-isoxazoline and/or 1-nitroso-pyrazoline from α-bromoketone oximes and diazo compounds
作者:Jianhua Guo、John Gaudette、Jie-Fei Cheng
DOI:10.1016/j.tetlet.2008.12.032
日期:2009.2
Reaction of alpha-bromoketone oximes with diazo compounds in the presence of a metal catalyst and base led to the unprecedented formation of two types of rings: Delta(2)-isoxazolines and 1-nitrosopyrazolines. (C) 2008 Elsevier Ltd. All rights reserved.
Acyclic nitronate olefin cycloaddition (ANOC): regio- and stereospecific synthesis of isoxazolines
作者:Liang Ma、Luyao Kou、Feng Jin、Xionglve Cheng、Suyan Tao、Gangzhong Jiang、Xiaoguang Bao、Xiaobing Wan
DOI:10.1039/d0sc05607c
日期:——
We report the first demonstrations of intra- and intermolecular acyclic nitronate olefin cycloaddition (ANOC) reactions that enable the highly efficient syntheses of isoxazolines bearing various functional groups. This general approach to accessing γ-lactone fused isoxazolines was hitherto unprecedented. The room temperature transformations reported herein exhibit wide substrate scopes, as evidenced