Mechanistic Considerations on the Oxime–Nitrone Isomerization and Intramolecular Cycloaddition Reaction of 3-(Alk-2-enylamino)propionaldehyde Oximes
作者:Michihiko Noguchi、Hirofumi Okada、Masayuki Tanaka、Satoshi Matsumoto、Akikazu Kakehi、Hidetoshi Yamamoto
DOI:10.1246/bcsj.74.917
日期:2001.5
3-(acryloylamino)-2,2-dimethylpropionaldehyde oximes underwent thermally induced 1,3-dipolar cycloaddition under mild conditions, leading to perhydroisoxazolo[4,3-c]pyridine derivatives. The features of the intramolecular oxime–olefin cycloaddition in this system and the roles of the geminal methyl groups at the 2-position and the alkenylamino nitrogen in the oxime–nitrone isomerization process are discussed based on
3-(Alk-2-enylamino)- 和 3-(丙烯酰氨基)-2,2-二甲基丙醛肟在温和条件下经历热诱导 1,3-偶极环加成,导致全氢异恶唑并 [4,3-c] 吡啶衍生物。基于动力学研究讨论了该系统中分子内肟-烯烃环加成的特征以及 2-位的孪生甲基和烯基氨基氮在肟-硝酮异构化过程中的作用。