Reaction of β-dimethylaminovinyl ketones with hydroxylamine: A simple and useful method for synthesis of 3- and 5-substituted isoxazoles
作者:Fernanda A. Rosa、Pablo Machado、Helio G. Bonacorso、Nilo Zanatta、Marcos A. P. Martins
DOI:10.1002/jhet.5570450337
日期:2008.5
The regioselective synthesis of 3- and 5-substituted-isoxazoles from the reaction of β-dimethyl-aminovinyl ketones [R-C(O)CHCH-NMe2, where R Ph, MeO-4-C6H4, F-4-C6H4, Cl-4-C6H4, Br-4-C6H4, O2N-4-C6H4, fur-2-yl, thien-2-yl, pyrrol-2-yl, Et and CCl3] and hydroxylamine hydrochloride varying only the reaction conditions (with and without the addition of pyridine) is reported.
由β-二甲基氨基乙烯基酮[RC(O)CH CH-NMe 2,其中R Ph,MeO-4-C 6 H 4,F-4- C 6 H 4,Cl-4-C 6 H 4,Br-4-C 6 H 4,O 2 N-4-C 6 H 4,呋喃-2-基,噻吩-2-基,吡咯-2-报道了仅改变反应条件(添加和不添加吡啶)的烷基,Et和CCl 3 ]和盐酸羟胺。
A novel synthesis of 5-substituted isoxazoles from propargylic amines and N -hydroxyphthalimide
作者:Yicheng Zhang、Wei Chen、Xueshun Jia
DOI:10.1016/j.tetlet.2018.04.062
日期:2018.5
A mild and efficient method for the synthesis of 5-substituted isoxazoles through cyclization of propargylic amines with N-hydroxyphthalimide (NHPI) under metal-free conditions was developed.
Synthesis of Isoxazoles via One-Pot Oxidation/Cyclization Sequence from Propargylamines
作者:Mengyan Duan、Guodong Hou、Yabiao Zhao、Congjun Zhu、Chuanjun Song
DOI:10.1021/acs.joc.2c00896
日期:2022.8.19
A facile strategy for the synthesis of isoxazoles has been efficaciously developed, which involves oxidation of propargylamines to the corresponding oximes followed by CuCl-mediated intramolecular cyclization of the latter. This protocol shows a straightforward way to construct a series of isoxazole cores with a wide range of functional group compatibility. Meanwhile, a gram-scale experiment and synthetic