C–H Activation of Methyl Arenes in the MnO2-Mediated Aroylation of N-Chlorosulfoximines
摘要:
An investigation into the reactivity profile of N-halogenated sulfoximines has led to the development of a new method for the synthesis of N-aroylated sulfoximines. This protocol involves the manganese oxide promoted C-H activation of methyl arenes to form an aroyl intermediate which then reacts readily with N-chlorosulfoximines to form a series of valuable aroyl sulfoximine derivatives in high 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
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.
The visible light-promoted synthesis of N-aroylsulfoximines has been accomplished via an oxidative dehydrogenative coupling at room temperature under air without the addition of a photosensitizer, metal catalyst, or base. This process exhibits good functional group tolerance, allows facile isolation and purification, and affords N-aroylsulfoximines with high efficiency. The efficiency of the newly developed
Direct C(sp<sup>2</sup>
)−H Hydroxylation of Arenes with Palladium(II)/Oxygen Using Sulfoximines as a Recyclable Directing Group
作者:Prasenjit Das、Joyram Guin
DOI:10.1002/cctc.201800064
日期:2018.6.7
aerobic palladium(II) catalysis presented herein offers facile entry to various substituted phenols through site‐selective C−H hydroxylation of arenes by using sulfoximines as a reusable directing group. The notable aspects of our method include the use of molecular oxygen (O2) as the soleoxidant, the activation of molecular oxygen through aldehyde autoxidation, operational simplicity, and the mechanistic