作者:Jaya Kishore Vandavasi、XiYe Hua、Hamdi Ben Halima、Stephen G. Newman
DOI:10.1002/anie.201710241
日期:2017.11.27
The use of transition‐metal catalysis to enable the coupling of readily available organic molecules has greatly enhanced the ability of chemists to access complex chemical structures. In this work, an intermolecular coupling reaction that unites organotriflates and aldehydes is presented. A unique catalyst system is identified to enable this reaction, featuring a Ni0 precatalyst, a tridentate Triphos
Synthesis of carbonylated heteroaromatic compounds via visible-light-driven intramolecular decarboxylative cyclization of o-alkynylated carboxylic acids
An efficient strategy for the easy access to carbonylated heteroaromatic compounds has been developed via a visible-light-promoted intramolecular decarboxylative cyclization reaction of o-alkynylated carboxylic acids. This method is characterized by its benign conditions and the tolerance to a wide range of functionalities.
Aerobic oxidation of alcohols with air catalyzed by decacarbonyldimanganese
作者:Shan-Shui Meng、Li-Rong Lin、Xiang Luo、Hao-Jun Lv、Jun-Ling Zhao、Albert S. C. Chan
DOI:10.1039/c9gc02446h
日期:——
The oxidation of alcohols to carbonyl compounds using air as the terminal oxidant is highly desirable. As described in previous reports, the abstraction of α-H of the alcohol is the most important step, and it typically requires not only a metal catalyst but also complex ligands, co-catalysts and bases. Herein, we report a practical and efficient method for the oxidation of primary alcohols, secondary
The cross-coupling reaction between arylboronicacids, carbon monoxide (1 atm), and aryl iodides in the presence of palladium catalyst and base provided unsymmetrical biaryl ketones in high yields. The choice of a suitable base and solvent was essential to achieve selective formation of the unsymmetrical biaryl ketone without a biaryl by-product.
The present invention is directed to a reagent for use in the preparation of organomagnesium compounds as well as to a method of preparing such organomagnesium compounds. The present invention furthermore provides a method of preparing functionalized or unfunctionalized organic compounds as well as the use of the reagents of the present invention in the preparation of organometallic compounds and their reaction with electrophiles. Finally, the present invention is directed to the use of lithium salts - LiY in the preparation of organometallic compounds and their reactions with electrophiles and to an organometallic compound which is obtainable by the disclosed method.