Decarboxylative Cyanation of Aliphatic Carboxylic Acids via Visible-Light Flavin Photocatalysis
作者:Nieves P. Ramirez、Burkhard König、Jose C. Gonzalez-Gomez
DOI:10.1021/acs.orglett.9b00064
日期:2019.3.1
An operationally simple method is disclosed for the decarboxylative cyanation of aliphaticcarboxylicacids at room temperature. Riboflavin tetraacetate, which is an inexpensive organic photocatalyst, promotes the oxidation of carboxylicacids upon visible-light activation. After decarboxylation, the generated radicals are trapped by TsCN, yielding the desired nitriles without any further additive
Photoreactive fused aziridinylpiperazines on the background of 4-substituted chalcones and their benzimidazolic analogs
作者:Volodymyr M. Kotlyar、Oleksii O. Kolomoitsev、Dmytro V. Nikolaievskyi、Polina I. Pedan、Andrii Yu Chumak、Valery D. Orlov、Svitlana V. Shishkina、Andrey O. Doroshenko
DOI:10.1016/j.molstruc.2018.12.015
日期:2019.3
Abstract The reaction of bromo-substituted chalcones with various diamino-compounds leads to the fused heterocyclic products, aziridinylpiperazines, exhibiting photoreactivity in the crystalline state. Crystals of 4-nitrosubstituted compounds of this family change their color from yellowish to deep violet-blue, 4-cyanosubstituted ones – from yellowish to pink at UV irradiation. Discussion on the mechanism
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.