Lewis Acid Catalyzed Tandem Polycyclization of Internal Alkynols and Vinyl Azides
作者:Hai Xiao Siyang、Xiao Yue Ji、Xu Rui Wu、Xin Yan Wu、Pei Nian Liu
DOI:10.1021/acs.orglett.5b02556
日期:2015.11.6
A novel Lewisacidcatalyzedtandem cyclization reaction of internalalkynols and vinylazides has been achieved to afford a series of products containing a pyran-based indeno[1,2-c]isochromene scaffold in moderate to high yields. This tandempolycyclization protocol provides a straightforward entry to construct the complex polycyclic skeleton through cycloisomerization, formal [4 + 2] cycloaddition
已经实现了内部炔醇和乙烯基叠氮化物的新型路易斯酸催化串联环化反应,以中等至高收率提供了一系列含有吡喃基茚并[1,2- c ]异亚丙基支架的产物。该串联多环化方案为通过环异构化,正式的[4 + 2]环加成和消除过程提供了直接构建复杂的多环骨架的方法。
Cu-Catalyzed Transformation of Alkynes and Alkenes with Azide and Dimethyl Sulfoxide Reagents
A novel and efficient Cu-catalyzed nitrogenation of alkynes and alkenes for the direct synthesis of sulfur-containing triazoles is described. Simple and readily available sulfoxides and azides are employed as the S- and N-source to prepare highly value N-,S-containing compounds from simple alkynes and alkenes.