A bifunctional strategy for N-heterocyclic carbene-stabilized iridium complex-catalyzed <i>N</i>-alkylation of amines with alcohols in aqueous media
作者:Ming Huang、Yinwu Li、Jiahao Liu、Xiao-Bing Lan、Yan Liu、Cunyuan Zhao、Zhuofeng Ke
DOI:10.1039/c8gc02298d
日期:——
2-hydroxypyridine and a thermally stable N-heterocyclic carbene ligand, an Ir-catalyzed N-monoalkylation reaction has been developed in aqueous media under base-free conditions. This reaction proceeds smoothly with high yields of various aromatic amines and sulfonamides with a wide range of primary alcohols. Experimental and computational studies revealed a metal–ligand cooperative mechanism and its thermal stability
The synthesis of a crystalline ethynyl-1,2-benziodoxol-3(1H)-one (EBX)–acetonitrile complex is described. EBX has been widely used as an active species for a variety of reactions; however, its high instability has so far prevented its isolation. The EBX–acetonitrile is self-assembled into a double-layered honeycomb structure through weak hypervalent iodine secondary interactions and hydrogen bonding
Regioselective Access to Sultam Motifs through Cobalt-Catalyzed Annulation of Aryl Sulfonamides and Alkynes using an 8-Aminoquinoline Directing Group
作者:Oriol Planas、Christopher J. Whiteoak、Anna Company、Xavi Ribas
DOI:10.1002/adsc.201500690
日期:2015.12.14
The use of cobalt as catalyst in direct CH activation protocols as a replacement for more expensive second row transition metals is currently attracting significant attention. Herein we disclose a facile cobalt-catalyzed CH functionalization route towards sultammotifsthroughannulation of easily prepared arylsulfonamides and alkynesusing8-aminoquinoline as a directinggroup. The reaction shows