Intramolecular cycloaddition of azomethine ylides, from imines of O-acylsalicylic aldehyde and ethyl diazoacetate, to ester carbonyl – experimental and DFT computational study
作者:Anastasia P. Kadina、Alexander F. Khlebnikov、Mikhail S. Novikov、Pedro J. Pérez、Dmitry S. Yufit
DOI:10.1039/c2ob25676b
日期:——
Intramolecular 1,3-dipolar cycloaddition of alkoxycarbonyl-substituted azomethine ylides to ester carbonyl was realized for the first time in the reaction of imines of O-acylsalicylic aldehyde with ethyl diazoacetate in the presence of Cu(tfacac)2. The stereoselectivity of the cycloaddition is explained using DFT calculations.
首次实现了醇基羧酸酯取代的亚胺基亚胺盐与酯羰基的分子内1,3-偶极环加成反应,该反应在Cu(tfacac)2的存在下进行,涉及O-酰基水杨醛的亚胺与乙基二氮乙酸酯的反应。利用DFT计算解释了环加成的立体选择性。