通过迈克尔加成/环化(Gabriel-Cromwell)工艺,在95℃下使用略有过量的伯胺和Cs 2 CO 3作为碱,由α-碘代环烯酮以很高的收率制备了氮丙啶。使用手性胺可以制备光学纯的氮丙啶。同样的方法对于由无环α-卤代饱和化合物合成氮丙啶也是有效的。2-氧氮杂双环与几种亲核试剂反应以优异的产率提供了α-杂原子取代的环状烯酮。
The Aza-Wharton Reaction: Syntheses of Cyclic Allylic Amines and Vicinal Hydroxyamines from the Respective Acylaziridines
作者:Saúl Silva、Paula Rodrigues、Isabel Bento、Christopher D. Maycock
DOI:10.1021/jo5029387
日期:2015.3.20
The Wharton reaction, initially described for acyl epoxides, has been studied using the structurally similar aziridines. By this reaction, a range of cyclic allylicamines and vicinal amino alcohols have been prepared stereoselectively and, in some cases, enantiomerically pure.
A Remarkably Efficient Phase-Transfer Catalyzed Amination of α-Bromo-α, β-Unsaturated Ketones in Water
作者:Alemayehu Mekonnen、Alemu Tesfaye
DOI:10.1155/2021/6616458
日期:2021.1.4
10 mol% of phase-transfer, PT catalysts in water. Some chiralquaternaryammonium salts derived from Cinchona alkaloids were investigated as water-stable PT catalysts. The scope and limitations of the reaction have also been investigated. The catalytic performances were significantly improved in comparison with the corresponding ordinary quaternaryammoniumsaltcatalysts, and excellent yields (81%–96%)