Gold(<scp>iii</scp>)-catalyzed chemoselective annulations of anthranils with <i>N</i>-allylynamides for the synthesis of 3-azabicyclo[3.1.0]hexan-2-imines
作者:Lina Song、Xianhai Tian、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1039/c9cc04027g
日期:——
We herein report the gold(iii)-catalyzed selective annulation of anthranils with N-allylynamides under mild conditions.
我们在此报告了在温和条件下金(III)催化的选择性闭环反应,即苯并噻唑与N-烯丙基亚胺的环化。
Palladium- and Ruthenium-Catalyzed Cycloisomerization of Enynamides and Enynhydrazides: A Rapid Approach to Diverse Azacyclic Frameworks
作者:P. Ross Walker、Craig D. Campbell、Abid Suleman、Greg Carr、Edward A. Anderson
DOI:10.1002/anie.201304186
日期:2013.8.26
I want to ride my azacycle: The title reaction of enynamides affords a wide diversity of azacycles. The reactions are high‐yielding, highly stereoselective, and proceed rapidly under mild reaction conditions. Equivalent transformations using enynhydrazides offer new routes to pyrazole and indazole scaffolds. Boc=tert‐butoxycarbonyl, EWG=electron‐withdrawing group, Ns=4‐nitrobenzenesulfonyl, Ts=4‐toluenesulfonyl
Gold(III)-Catalyzed Formal [3 + 2] Annulations of <i>N</i>-Acyl Sulfilimines with Ynamides for the Synthesis of 4-Aminooxazoles
作者:Xianhai Tian、Lina Song、Chunyu Han、Cheng Zhang、Yufeng Wu、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1021/acs.orglett.9b01011
日期:2019.4.19
A gold-catalyzed formal 1,3-dipolar [3 + 2] annulation using readily accessible N-acyl sulfilimines and ynamides is reported. This reaction includes the cleavage of a N–S bond and subsequent C–O bond formation. In total, 30 oxazole derivatives bearing diverse functionalities could be prepared in 43–98% yield from the corresponding sulfilimines and ynamides.
A rare-earth salt Yb(OTf)3-catalyzed regioselective hydroamination of ynamides with anilines and p-toluenesulfonamide has been developed. This protocol provided facile access to a diverse range of amidines with good functional group tolerance in moderate to high yields.
General Entry into <i>o</i>
-,<i>o′</i>
-Heteroatom-Linked <i>N</i>
-(Hetero)aryl-Imidazole Motifs by Gold-Catalysed Formal [3+2]-Dipolar Cycloaddition
作者:Miguel Garzón、Elsa M. Arce、Raju Jannapu Reddy、Paul W. Davies
DOI:10.1002/adsc.201700249
日期:2017.6.6
general redox‐neutral approach into the o‐,o′‐heteroatom‐linked N‐(hetero)aryl‐imidazole family of heteroaromatics has been developed. New types of heteroatom substituted carbimidoyl nitrenoids are efficiently realised from robust, bench‐stable N‐(heteroaryl)‐pyridinium‐N‐aminides by formal gold‐catalysed [3+2]‐dipolar cycloadditions across ynamides. Broad structural variety and functional group tolerance