[2 + 2 + 1] Cycloaddition of <i>N</i>-tosylhydrazones, <i>tert</i>-butyl nitrite and alkenes: a general and practical access to isoxazolines
作者:Liang Ma、Feng Jin、Xionglve Cheng、Suyan Tao、Gangzhong Jiang、Xingxing Li、Jinwei Yang、Xiaoguang Bao、Xiaobing Wan
DOI:10.1039/d1sc02352g
日期:——
N-tosylhydrazones has not been examined. Herein, we report the first demonstrations of [2 + 2 + 1] cycloaddition reactions that allow the facile synthesis of isoxazolines, employing N-tosylhydrazones, tert-butyl nitrite (TBN) and alkenes as reactants. This process represents a new type of cycloaddition reaction with a distinct mechanism that does not involve the participation of nitrile oxides. This
Generation of Nitrile Oxides under Nanometer Micelles Built in Neutral Aqueous Media: Synthesis of Novel Glycal-Based Chiral Synthons and Optically Pure 2,8-Dioxabicyclo[4.4.0]decene Core
作者:Nirbhik Chatterjee、Palash Pandit、Samiran Halder、Amarendra Patra、Dilip K. Maiti
DOI:10.1021/jo801337k
日期:2008.10.3
for chemoselective oxidation of aldoximes to nitrile oxides by iodosobenzene in neutral aqueousmedia is reported. Their in situ intermolecular 1,3-dipolar cycloaddition (1,3-DC) with olefins in nanometer aqueous micelles occurs with improved stereoselectivity and acceleration of reactionrate toward synthesis of new chiral synthons, 3-(2'-C-3',4',6'-tri-O-benzylglycal)-Delta(2)-isoxazolines and others
Synthesis and diverse general oxidative cyclization catalysis of high-valent Mo<sup>VI</sup>O<sub>2</sub>(HL) to ubiquitous heterocycles and their chiral analogues with high selectivity
作者:Nabyendu Pramanik、Satinath Sarkar、Dipanwita Roy、Sudipto Debnath、Sukla Ghosh、Saikat Khamarui、Dilip K. Maiti
DOI:10.1039/c5ra21825j
日期:——
The first synthesis and diverse oxidative cyclization catalysis properties of high-valent MoVI–triazole are demonstrated towards highly selective construction of benzimidazoles, benzothiazoles, isoxazolines, isoxazoles and their chiral analogues.
A New Route to Nitrile Oxides from Primary Alkylhalides for <i>in situ</i> Dipolar Cycloadditions
作者:Dilipkumar Maiti、Pranab K. Bhattacharya
DOI:10.1055/s-1998-1669
日期:1998.4
A new route to nitrile oxide preparation from primary alkylbromide, chloride, nitrite and their cycloadditions with olefins to form isoxazolines in a single pot are described.
1,3-Dipolar cycloaddition reaction of aryl nitrile oxides with alkenes using imidazole and pyridine containing reusable polymeric base catalysts
作者:Nilesh N. Korgavkar、Shriniwas D. Samant
DOI:10.1080/00397911.2017.1399207
日期:2018.2.16
electron microscopy (FE-SEM), and Brunauer-Emmett-Teller (BET) surface area analysis. Their swelling behavior was also studied. They were used as base catalysts for 1,3-dipolar cycloadditionreaction of arylnitrileoxides, generated in situ from N-hydroxyimidoyl chloride, with N-phenylmaleimide and ethyl acrylate, to obtain 3-arylisoxazolines. Both the bases gave excellent results. These polymers