Mesoionic Carbene–Iridium Complex Catalyzed <i>Ortho</i>-Selective Hydrogen Isotope Exchange of Anilines with High Functional Group Tolerance
作者:Wei Liu、Lei Cao、Zengyu Zhang、Gang Zhang、Shiqing Huang、Linwei Huang、Peng Zhao、Xiaoyu Yan
DOI:10.1021/acs.orglett.0c00402
日期:2020.3.20
Mesoionic carbene-iridium complex 1a has been investigated in the hydrogenisotopeexchange (HIE) reaction of anilines. By employing 1 mol % of 1a as catalyst, anilines were selectively deuterated at the ortho-position with high deuteration levels. High ortho-selectivity was observed for anilines with various competing directing groups, which is in contrast with catalytic results of Kerr's catalysts
Synthesis of Highly Stable 1,3-Diaryl-1<i>H</i>-1,2,3-triazol-5-ylidenes and Their Applications in Ruthenium-Catalyzed Olefin Metathesis
作者:Jean Bouffard、Benjamin K. Keitz、Ralf Tonner、Gregorio Guisado-Barrios、Gernot Frenking、Robert H. Grubbs、Guy Bertrand
DOI:10.1021/om200272m
日期:2011.5.9
The formal cycloaddition between 1,3-diaza-2-azoniaallene salts and alkynes or alkyne equivalents provides an efficient synthesis of 1,3-diaryl-1H-1,2,3-triazolium salts, the direct precursors of 1,2,3-triazol-5-ylidenes. These N,N-diarylated mesoionic carbenes (MICs) exhibit enhanced stability in comparison to their alkylated counterparts. Experimental and computational results confirm that these
Mesoionic Carbene‐Gold(I) Catalyzed Bis‐Hydrohydrazination of Alkynes with Parent Hydrazine
作者:Daniel R. Tolentino、Liqun Jin、Mohand Melaimi、Guy Bertrand
DOI:10.1002/asia.201403408
日期:2015.10
A novel synthetic route gives access to mesoioniccarbene and cyclopropenylidene supported gold chloride complexes. The corresponding cationic MIC‐gold complex obtained by chloride abstraction allows for the first transition metal‐catalyzed functionalization of both nitrogens of parenthydrazine.