Highly regio- and stereoselective 1,3-dipolar cycloaddition of stabilised azomethine ylides to 3,3,3-trihalogeno-1-nitropropenes: Synthesis of trihalomethylated spiroindenepyrroli(zi)dines
作者:Alexey Yu. Barkov、Nikolay S. Zimnitskiy、Igor B. Kutyashev、Vladislav Yu. Korotaev、Vladimir S. Moshkin、Vyacheslav Ya. Sosnovskikh
DOI:10.1016/j.jfluchem.2017.10.005
日期:2017.12
Reactions of (E)-3,3,3-trihalogeno-1-nitropropenes with stabilised azomethine ylides derived from ninhydrin and indenoquinoxalinones on the one hand, and sarcosine and proline on the other, proceed regio- and diastereoselectively to give a number of trihalomethylated spiroindenepyrrolidines and spiroindenepyrrolizidines in good yields.
(E)-3,3,3-三卤代-1-硝基丙烯与由茚三酮和茚并喹喔啉酮衍生的稳定的甲亚胺基化物,另一方面与肌氨酸和脯氨酸的反应,在区域和非对映异构体上选择性进行,得到许多三卤代甲基化螺茚并吡咯烷和螺螺茚并吡咯烷的产率高。