Trimethylsilyl Trifluoromethanesulfonate
Mediated Addition-Cyclization of N-Vinyloxazolidin-2-ones
to Nitrones: An Efficient Access to 4-Substituted 5-Azaisoxazolidines
Trimethylsilyl Trifluoromethanesulfonate
Mediated Addition-Cyclization of N-Vinyloxazolidin-2-ones
to Nitrones: An Efficient Access to 4-Substituted 5-Azaisoxazolidines
Access to Ynamides via CuO-Mediated Oxidative Amidation of Alkynes
作者:Chengfeng Xia、Xiaogang Tong、Guanghui Ni、Xu Deng
DOI:10.1055/s-0031-1290464
日期:——
Copper(II) oxide mediated the direct coupling of terminal alkynes and amides by way of C-H functionalization to afford ynamides as useful building blocks. Some alkali halides such as KCl were discovered to play a key role as additive in the coupling reaction, while other salts could suppress the formation of products.
氧化铜 (II) 通过 CH 官能化介导末端炔烃和酰胺的直接偶联,以提供作为有用结构单元的 ynamide。一些碱金属卤化物如 KCl 被发现在偶联反应中作为添加剂起关键作用,而其他盐类可以抑制产物的形成。
Trimethylsilyl Trifluoromethanesulfonate
Mediated Addition-Cyclization of <i>N</i>-Vinyloxazolidin-2-ones
to Nitrones: An Efficient Access to 4-Substituted 5-Azaisoxazolidines
Trimethylsilyl trifluoromethanesulfonate (TMSOTf) was conveniently used to promote the reaction involving N-alkenyloxazolidin-2-ones and activated nitrones, leading to new 4-substituted 5-azaisoxazolidines in good to excellent yields. This TMSOTf-promoted procedure expanded the scope of reaction of N-vinyloxazolidin-2-ones and nitrones in complementary way to the corresponding classical 1,3-dipolar cycloaddition. Some of these adducts could not be obtained under thermal activation.