N-Substitution dependent stereoselectivity switch in palladium catalyzed hydroalkynylation of ynamides: a regio and stereoselective synthesis of ynenamides
Tf<sub>2</sub>NH-catalyzed formal [3 + 2] cycloaddition of oxadiazolones with ynamides: a simple access to aminoimidazoles
作者:Yingying Zhao、Yancheng Hu、Xincheng Li、Boshun Wan
DOI:10.1039/c7ob00701a
日期:——
Oxadiazolones are first employed as the three-atom coupling partners in the Tf2NH-catalyzed cycloaddition with ynamides. This formal [3 + 2] cycloaddition allows a rapid synthesis of aminoimidazoles with a broad substrate scope. The approach also features a metal-free catalytic cycloaddition process, which may find applications in the synthesis of bioactive molecules. Besides, the resulting N-methyl
Copper-catalyzed coupling of 1,2-dibromo-1-styrenes with sulfonamides for the preparation of ynamides
作者:Yuan Yang、Xiaoyun Zhang、Yun Liang
DOI:10.1016/j.tetlet.2012.09.092
日期:2012.11
Ynamides were prepared through an efficient copper-catalyzed coupling reaction. In the presence of copper iodide, 1,10-phenanthroline, and Cs2CO3, the coupling reaction of 1,2-dibromo-1-styrenes with sulfonamides proceeded smoothly and generated the corresponding products with excellent isolated yields. (C) 2012 Elsevier Ltd. All rights reserved.
N-Substitution dependent stereoselectivity switch in palladium catalyzed hydroalkynylation of ynamides: a regio and stereoselective synthesis of ynenamides
作者:Vikas Dwivedi、Madala Hari Babu、Ruchir Kant、Maddi Sridhar Reddy
DOI:10.1039/c5cc06251a
日期:——
A palladium catalysed regioselective hydroalkynylation of ynamides for ynenamides is achieved with an N-substitution dependent stereoselectivity switch.
通过钯催化的选择性加氢炔化反应,可以将炔酰胺转化为烯酰胺,其立体选择性取决于N-取代基的选择。
Metal‐Free Hydrophosphoryloxylation of Ynamides: Rapid Access to Enol Phosphates
作者:Dalie An、Weinan Zhang、Bin Pan、Yingying Zhao
DOI:10.1002/ejoc.202001335
日期:2021.1.15
An addition reaction between phosphoric acids and ynamides was developed for the synthesis of amino‐derived enolphosphates. The protocol features metal‐free conditions, exclusive selectivity, short reaction times, and easy scale‐up. Notably, the resulting products could easily undergo Suzuki‐Miyaura cross‐coupling at room temperature.