Synthetic Applications of Pd(II)-Catalyzed C−H Carboxylation and Mechanistic Insights: Expedient Routes to Anthranilic Acids, Oxazolinones, and Quinazolinones
作者:Ramesh Giri、Jonathan K. Lam、Jin-Quan Yu
DOI:10.1021/ja9077705
日期:2010.1.20
carbon monoxide is discussed. Identification of two key intermediates, a mixed anhydride and benzoxazinone formed by reductive elimination from organometallic Ar(CO)Pd(II)-OTs species, provides mechanistic evidence for a dual-reaction pathway.
Mild and Efficient Palladium-Catalyzed Direct Trifluoroethylation of Aromatic Systems by C−H Activation
作者:Balázs L. Tóth、Szabolcs Kovács、Gergő Sályi、Zoltán Novák
DOI:10.1002/anie.201510555
日期:2016.2.5
With the utilization of a highly active trifluoroethyl(mesityl)iodonium salt, the developed catalytic method enables the first highlyefficient and selective trifluoroethylation of aromaticcompounds. The robust catalytic procedure provides the desired products in up to 95 % yield at 25 °C in 1.5 to 3 hours and tolerates a broad range of functional groups. The utilization of hypervalent reagents opens
Metal-free direct oxidative intermolecular diarylation of anilides at ambient temperature assisted by cascade selective formation of C–C and C–N bonds
作者:Rajarshi Samanta、Jonas Lategahn、Andrey P. Antonchick
DOI:10.1039/c2cc30324h
日期:——
A new atom-economical process of direct oxidative intermolecular functionalization of aniline derivatives by simple arenes was developed. The products were formed in a highly regioselective manner under metal-free conditions at ambient temperature.
aromatic ring with high site selectivity remains a challenging area in organofluorine chemistry. We herein report a highly para-selective C–H perfluoroalkylation of aniline substrates using the molybdenumhexacarbonyl catalyst. Various substituted anilids derived from anilids were well-tolerated, affording the corresponding products in moderate to good yields. Preliminary mechanism studies and density functional
Organocatalytic, Oxidative, Intramolecular CH Bond Amination and Metal-free Cross-Amination of Unactivated Arenes at Ambient Temperature
作者:Andrey P. Antonchick、Rajarshi Samanta、Katharina Kulikov、Jonas Lategahn
DOI:10.1002/anie.201102984
日期:2011.9.5
atom‐economical and environmentally friendly organocatalytic method for intramolecular CH amination, the CN bond forms at ambient temperature by abstraction of two atoms of hydrogen; only acetic acid and water are formed as by‐products. The method has also been extended to the unprecedented metal‐free cross‐amination of nonactivated arenes.