Synthesis 2023; 55(12): 1904-1914
DOI: 10.1055/s-0042-1752403
paper

Koser’s Reagent Mediated Oxidation of Aldoximes: Synthesis of Isoxazolines by 1,3-Dipolar Cycloadditions

Rajnish Budhwan
,
Megha Rawat
,
We sincerely thank Science and Engineering Research Board (SERB, research grant No. EMR/2017/000174), New Delhi for financial support to this work. The authors thank DST-FIST, New Delhi for providing funding (SR/FST/CS-II/2018/72 (C)) to the department for 500 MHz facility. R.B. thanks University Grants Commission (UGC) and M.R. thanks Ministry of Education India (MoE) for research fellowships.


Abstract

A metal- and base-free, robust, and convenient approach for the synthesis of isoxazoline derivatives is reported. This protocol involves 1,3-dipolar cycloaddition between in situ generated nitrile oxides from the corresponding aldoximes using [hydroxy(tosyloxy)iodo]benzene (HTIB, Koser’s reagent) and maleimides, styrene and acrylonitrile. The described methodology is very attractive as it is operationally simple, has broad scope, and does not require any base, metal, or other additives.

Supporting Information



Publication History

Received: 23 November 2022

Accepted after revision: 12 January 2023

Article published online:
01 March 2023

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