Copper-catalyzed room-temperature cross-dehydrogenative coupling of secondary amides with terminal alkynes: a chemoselective synthesis of ynamides
作者:Shuang-Yan Zhuo、Jian-Liang Ye、Xiao Zheng
DOI:10.1039/d3ob02032k
日期:——
A copper-catalyzed aerobicoxidativecross-dehydrogenativecoupling reaction between secondary amides and terminal alkynes has been developed. With the aid of ligands and 3 Å molecular sieves, ynamides can be efficiently synthesized at room temperature and conveniently scaled up. A legitimate mechanism involving nitrogen-centred radicals and copper trivalent intermediates has been proposed.
已经开发出仲酰胺和末端炔之间的铜催化的有氧氧化交叉脱氢偶联反应。借助配体和 3 Å 分子筛,可以在室温下高效合成 ynamides,并方便地放大生产。已经提出了涉及以氮为中心的自由基和三价铜中间体的合法机制。
New Stannyl Enamides
作者:Sébastien Naud、Jean-Christophe Cintrat
DOI:10.1055/s-2003-40213
日期:——
New stannyl enamines derived from N-ethynyl oxazolidin-2-ones have been obtained. We describe for the first time the preparation of N-ethynyl oxazolidin-2-ones using trimethylsilylethynyl iodonium triflate. The first results of transmetallation and quenching experiments with prochiral carbonyl derivatives to give β-amino alcohols are also described.