Diastereoselective Synthesis of Oxazoloisoindolinones via Cascade Pd-Catalyzed <i>ortho</i>-Acylation of <i>N</i>-Benzoyl α-Amino Acid Derivatives and Subsequent Double Intramolecular Cyclizations
作者:Kun Jing、Xiang-Nan Wang、Guan-Wu Wang
DOI:10.1021/acs.joc.8b02509
日期:2019.1.4
The first cascade diastereoselective synthesis of oxazoloisoindolinones via the palladium-catalyzed decarboxylative ortho-acylation of N-benzoyl α-aminoacid derivatives followed by double intramolecular cyclizations has been demonstrated. This reaction, using α-aminoacids as directing groups and α-oxocarboxylic acids as the acylation source, features a broad substrate scope, good functional group
A facile and rapid preparation of hydroxamic acids by hydroxylaminolysis using DBU as base
作者:Audrey Beillard、Yushma Bhurruth-Alcor、Claire Bouix-Peter、Karinne Bouquet、Sandrine Chambon、Laurence Clary、Craig S. Harris、Corinne Millois、Grégoire Mouis、Gilles Ouvry、Romain Pierre、Arnaud Reitz、Loic Tomas
DOI:10.1016/j.tetlet.2016.04.003
日期:2016.5
While there are many protocols for the preparation of hydroxamic acids from their corresponding carboxylic acid or carboxylic ester precursors, most use strong mineral bases that can lead to carboxylic acid impurities that can be difficult to remove using standard chromatographic techniques. This problem is exacerbated when the carbonyl group is hindered. Herein, we communicate a robust hydroxylaminolysis
Paired Electrolysis for Decarboxylative Cyanation: 4-CN-Pyridine, a Versatile Nitrile Source
作者:Gadde Sathish Kumar、Prashant S. Shinde、Haifeng Chen、Krishnamoorthy Muralirajan、Rajesh Kancherla、Magnus Rueping
DOI:10.1021/acs.orglett.2c01897
日期:2022.9.9
decarboxylative cyanation of amino acids under paired electrochemical reaction conditions has been developed. 4-CN-pyridine was found to be a new and effective cyanation reagent undercatalyst-freeconditions. Mechanistic studies support a nucleophilic reaction pathway, and the cyanation protocol can be applied to diverse substrates including N,N-dialkyl aniline and indole derivatives.