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
Interweaving Visible‐Light and Iron Catalysis for Nitrene Formation and Transformation with Dioxazolones
作者:Jing‐Jing Tang、Xiaoqiang Yu、Yi Wang、Yoshinori Yamamoto、Ming Bao
DOI:10.1002/anie.202016234
日期:2021.7.19
transfer reactions with dioxazolones for intermolecular C(sp3)-N, N=S, and N=P bond formation are described. These reactions occur with exogenous-ligand-free process and feature satisfactory to excellent yields (up to 99 %), an ample substrate scope (109 examples) under mild reaction conditions. In contrast to intramolecular C−H amidations strategies, an intermolecular regioselective C−H amidation via
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