Iron-Catalyzed One-Pot N-Aroylation of NH-Sulfoximines with Methylarenes through Benzylic C–H Bond Oxidation
摘要:
An efficient catalytic method has been developed for the synthesis of N-aroylated sulfoximines from readily available toluenes (methylarenes) as source of the aroyl coupling partner and NH-sulfoximines, employing an environmentally benign iron catalyst. This protocol involves oxidation of benzylic C-H bonds of toluenes to generate aroyl radical intermediates followed by oxidative coupling with NH-sulfoximines to form N-aroylated sulfoximines in good to excellent yields. The intermediate aroyl radical is successfully trapped with TEMPO to prove the radical pathway of the reaction.
Copper-catalyzed preparation of <i>N</i>-aroylated sulfoximines from methylarenes
作者:Anguo Hou、Zijian Zhao
DOI:10.1080/00397911.2017.1318444
日期:2017.7.3
ABSTRACT A copper-catalyzed methodology for the preparations of N-aroylated sulfoximines from methylarenes was herein demonstrated. The transformation proceeded with the assistance of external oxidant tert-butyl hydroperoxide, requiring for no additional solvents or ligands. The good compatibility and high efficiency of the newly developed protocol were well described by 21 examples and up to 91% yields
Transition metal-free aroylation of NH-sulfoximines with methyl arenes
作者:Ya Zou、Jing Xiao、Zhihong Peng、Wanrong Dong、Delie An
DOI:10.1039/c5cc05483d
日期:——
An iodine-catalyzed N-aroylation of NH-sulfoximines with methyl arenes was herein demonstrated without participation of external organic solvents, transition metal-catalysts or ligands.
Rh(III)-Catalyzed Relay Double Carbenoid Insertion and Diannulation of Sulfoximine Benzamides with α-Diazo Carbonyl Compounds: Access to Furo[2,3-<i>c</i>]isochromenes
efficient rhodium-catalyzed construction of furo[2,3-c]isochromene scaffolds through tandem double carbenoid insertion and diannulation of sulfoximine benzamides with α-diazo carbonylcompounds has been developed. Mechanistic studies revealed that the alkyl-rhodium intermediate generated by carbenoid insertion was directly trapped with another molecule of carbene species, followed by subsequent intramolecular
carbonylation of aryl halides followed by nucleophilic attack of NH-sulfoximines. This reaction tolerates a range of aryl iodides and sulfoximines to provide the N-aroyl sulfoximines in good to excellent yields. Less reactive arylbromides also underwent sulfoximinocarbonylation and afforded the products. This methodology is free from phosphine ligands. The heterogeneous Pd/Ccatalyst was successfully
Palladium nanoparticles catalyzed aroylation of NH-sulfoximines with aryl iodides
作者:Nidhi Sharma、Govindasamy Sekar
DOI:10.1039/c6ra05334c
日期:——
A novel approach towards aroylation of NH-sulfoximines with aryl iodides in the presence of carbon monoxide using Pd nanoparticles stabilized by a binaphthyl backbone (Pd-BNP) has been developed.