Trimethylsilyl Trifluoromethanesulfonate
Mediated Addition-Cyclization of N-Vinyloxazolidin-2-ones
to Nitrones: An Efficient Access to 4-Substituted 5-Azaisoxazolidines
isoxazolidines were synthesized in good to excellent yields by 1,3-dipolar cycloaddition of N-vinylamide dipolarophiles and nitrones. Strikingly, solvent-free conditions gave high conversion and yields, shortened reaction time, and minimized degradation products. N-Vinyloxazolidin-2-one and its analogues used in these cycloaddition reactions were conveniently prepared in excellent yields by a modified
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。