Synthesis of Vinyl- and Aryl-Acyl Sulfonimidamides Through Pd-Catalyzed Carbonylation Using Mo(CO)<sub>6</sub>as ex situ CO Source
作者:Prasad B. Wakchaure、Sanjay R. Borhade、Anja Sandström、Per I. Arvidsson
DOI:10.1002/ejoc.201403148
日期:2015.1
We report the synthesis of N-(α,β-unsaturated acyl)-substituted sulfonimidamidesthrough a Pd-catalyzedcarbonylation protocol, employing sulfonimidamides as nucleophiles usingCO gas released exsitu, and vinyl/aryl halides and triflates as reagents. The reaction is general and offers a unique class of products in moderate to good yields for a wide range of substrates and electrophiles; for example
Denitrogenative palladium-catalyzed coupling of aryl halides with arylhydrazines under mild conditions
作者:Sheng Chang、Lin Lin Dong、Hai Qing Song、Bo Feng
DOI:10.1039/c8ob00305j
日期:——
development of a method for the Pd(II)-catalyzed denitrogenative coupling of arylhydrazines to give functionalized biaryls in good yield, using aryl bromides or aryl iodides as convenient and inexpensive aryl sources, is reported. High functional group tolerance is demonstrated for electronically distinct arylhydrazines as well as arylhalides. The desired products were isolated in good to excellent yields
accomplished. This chemistry is operative under the cooperative catalysis of cupric oxide nanoparticles (<50 nm) and DABCO. The key beneficial aspects of this protocol include: (i) broad substrate scope, (ii) no vigorous work-up, (iii) short reaction time, (iv) solvent-free condition, (v) commercial viability of substrates/reagents (vi) good chemical yields and selectivity. The other merit of this chemistry
Copper-Catalyzed Electrophilic Carbofunctionalization of Alkynes to Highly Functionalized Tetrasubstituted Alkenes
作者:Marcos G. Suero、Elliott D. Bayle、Beatrice S. L. Collins、Matthew J. Gaunt
DOI:10.1021/ja401840j
日期:2013.4.10
Copper catalysts enable the electrophiliccarbofunctionalization of alkynes with vinyl- and diaryliodonium triflates. The new process forms highly substituted alkenyl triflates from a range of alkynes via a pathway that is opposite to classical carbometalation. The alkenyl triflate products can be elaborated through cross-coupling reactions to generate synthetically useful tetrasubstituted alkenes
A General Palladium-Catalyzed Carbonylative Sonogashira Coupling of Aryl Triflates
作者:Xiao-Feng Wu、Basker Sundararaju、Helfried Neumann、Pierre H. Dixneuf、Matthias Beller
DOI:10.1002/chem.201002653
日期:2011.1.3
Trifling with triflates: A new protocol for the carbonylativeSonogashira reactions of aryl triflates (see scheme) that provides a significant extension of this interesting methodology is described.