[5 + 2] Cycloaddition Reaction of 2-Vinylaziridines and Sulfonyl Isocyanates. Synthesis of Seven-Membered Cyclic Ureas
作者:Eri Kanno、Kenichi Yamanoi、Shunsuke Koya、Isao Azumaya、Hyuma Masu、Ryu Yamasaki、Shinichi Saito
DOI:10.1021/jo201959a
日期:2012.3.2
The [5 + 2] cycloaddition reaction of 2-vinylaziridines with sulfonyl isocyanates proceeded smoothly under mild conditions, and various cyclic ureas were isolated in high yields. The remarkable solvent effect on the reaction was observed, and the preferential formation of the seven-membered ring occurred when the reaction was carried out in CH2Cl2. The scope and limitation were studied, and the mechanism
2-乙烯基氮丙啶与磺酰基异氰酸酯的[5 + 2]环加成反应在温和条件下平稳进行,并以高收率分离出各种环状脲。观察到对反应的显着溶剂作用,并且当在CH 2 Cl 2中进行反应时,优先形成了七元环。研究了反应的范围和局限性,并讨论了该反应的机理。本研究为合成七元环脲提供了一种新的简单方法。