CuFe<sub>2</sub>O<sub>4</sub> nanoparticles catalyze the reaction of alkynes and nitrones for the synthesis of 2-azetidinones
作者:Maaroof Zarei
DOI:10.1039/d0nj02660c
日期:——
CuFe2O4 nanoparticles acted as a highly efficient heterogeneous catalyst in the reaction of alkynes and nitrones (Kinugasa reaction) for the synthesis of various 2-azetidinones. In all cases, the reactions proceeded conveniently under mild conditions with good-to-excellent yields and with a wide range of functional-group tolerance. The catalyst could be separated readily using an external magnet.
CuFe 2 O 4纳米颗粒在炔烃和硝酮的反应(Kinugasa反应)中用于合成各种2-氮杂环丁酮,是一种高效的多相催化剂。在所有情况下,反应均在温和的条件下方便地进行,具有良好至优异的产率和宽泛的官能团耐受性。使用外部磁体可以容易地分离催化剂。
A Highly Site-, Regio-, and Stereoselective Lewis Acid Catalyzed Formal [3+3] Cycloaddition of Methylenecyclopropane-1,1-Diesters with C,N-Diarylnitrones
作者:Bao Hu、Jianlin Zhu、Siyang Xing、Jie Fang、Ding Du、Zhongwen Wang
DOI:10.1002/chem.200801990
日期:2009.1.2
Another pathway: A new type of Lewis acid promoted [3+3] cycloaddition of methylenecyclopropane‐1,1‐diesters with C,N‐diarylnitrones is disclosed. This cycloaddition is highly site‐, regio‐, and stereoselective and proceeds in moderate‐to‐excellent yields. A three‐component one‐pot version of the cycloaddition is also reported.
Nitrone cycloaddition to quinones: A novel strategy for the synthesis of benzisoxazolidenes
作者:Rony Rajan Paul、Vimal Varghese、P. B. Beneesh、C. R. Sinu、E. Suresh、E. R. Anabha
DOI:10.1002/jhet.255
日期:——
1,3‐Dipolar cycloaddition reaction involving nitrones and benzoquinones resulting in the formation of benzisoxazolidene is described. As the nitrone is selectively added to carbon–carbon double bond of the benzoquinone, the quinone‐nitrone reaction is considered as a special case among quinone‐1,3‐dipole cycloaddition reactions. Molecular orbital calculation was performed to examine the electronic