Enantioselective Synthesis of 2-Isoxazolines<i>via</i>Asymmetric 1,3-Dipolar Cycloaddition of Nitrile Oxide to Achiral Allyl Alcohol
作者:Yutaka Ukaji、Kazunori Sada、Katsuhiko Inomata
DOI:10.1246/cl.1993.1847
日期:1993.11
The asymmetric 1,3-dipolarcycloaddition of a nitrile oxide to an achiral allyl alcohol was achieved by the use of (R,R)-diisopropyl tartrate as a chiralauxiliary. Treatment of the allyl alcohol with diethylzinc and the tartrate, followed by the addition of diethylzinc and a hydroximoyl chloride, afforded the corresponding (R)-2-isoxazolines with excellent enantioselectivity.
Palladium-Catalyzed Oxime Assisted Intramolecular Dioxygenation of Alkenes with 1 atm of Air as the Sole Oxidant
作者:Ming-Kui Zhu、Jun-Feng Zhao、Teck-Peng Loh
DOI:10.1021/ja100716x
日期:2010.5.12
This paper describes a palladium-catalyzed oxime assisted intramolecular dioxygenation of alkenes by using 1 atm of air as the sole oxidant under extremely mild conditions, which demonstrated the feasibility of incorporating atmospheric oxygen into synthetically useful products under 1 atm of air at room temperature.
Green Organocatalytic Synthesis of Isoxazolines via a One-Pot Oxidation of Allyloximes
作者:Ierasia Triandafillidi、Christoforos G. Kokotos
DOI:10.1021/acs.orglett.6b03380
日期:2017.1.6
A green, sustainable, organocatalytic, and efficient synthesis of isoxazolines from allyloximes was developed. A 2,2,2-trifluoroacetophenone-catalyzed oxidation of allyloximes, utilizing H2O2 as the green oxidant, was taken advantage of in order to introduce a cheap and environmentally friendly protocol for the synthesis of substituted isoxazolines. A variety of substitution patterns, both aromatic
从烯丙基肟开发了一种绿色,可持续,有机催化和高效的异恶唑啉合成方法。利用H 2 O 2作为绿色氧化剂,利用2,2,2-三氟苯乙酮催化的烯丙基肟的氧化反应,以引入廉价且环境友好的方法合成取代的异恶唑啉。芳香族和脂肪族部分的各种取代方式都具有良好的耐受性,从而导致异恶唑啉的产率中等至优异。