In Situ Generation of Oxazole Ylide and Interception with Sulfonamide: Construction of Amidines Using Two Diazo Molecules
作者:Jijun Chen、Wenhao Long、Yanwei Zhao、Haiyan Li、Yonggao Zheng、Pengcheng Lian、Xiaobing Wan
DOI:10.1002/cjoc.201800208
日期:2018.9
A novel generation of oxazoleylide and interception with sulfonamide have been well developed to construct fully substituted amidines. This copper‐catalyzed four‐component reaction incorporates twodiazomolecules to target amidines and shows broad substrate scope, excellent functional groups tolerance and good to excellent yields.
Cross coupling of sulfonyl radicals with silver-based carbenes: a simple approach to β-carbonyl arylsulfones
作者:Hanghang Wang、Pengcheng Lian、Yonggao Zheng、Jingjing Li、Xiaobing Wan
DOI:10.1039/d0ob00091d
日期:——
A radical–carbene coupling reaction of sulfonyl radicals and silver-based carbenes has been well established, which provides an efficient approach to various β-carbonyl arylsulfones.
Radical Decarboxylative Fluorination of Aryloxyacetic Acids Using<i>N</i>-Fluorobenzenesulfonimide and a Photosensitizer
作者:Joe C. T. Leung、Glenn M. Sammis
DOI:10.1002/ejoc.201500038
日期:2015.4
carboxylic acids was developed that uses photosensitizers and N-fluorobenzenesulfonimide (NFSI). Utilization of the oxidatively mild fluorine transfer agent NFSI enabled the synthesis of fluoromethyl ethers that were previously inaccessible with decarboxylative fluorinations performed with Selectfluor. Mechanistic studies are consistent with the photosensitizer effecting oxidation of the aryloxyacetic acid
Metal‐free triazole turns: 1,5‐Disubstituted peptidyl triazoles are obtained regioselectively from the 1,3‐dipolar cycloaddition of peptidyl phosphoranes and azides. Peptide turns are thus formed that contain a conformationally locked cis peptide bond. Being regioselective and free of heavy metals, this reaction may find broad application in chemical biology and medicinal chemistry.