Highly Efficient Method for the Synthesis of Carboxamides from Carboxylic Acids and Amines Using Benzenesulfonic Anhydride (BSA)
作者:Setsuo Funasaka、Koji Kato、Teruaki Mukaiyama
DOI:10.1246/cl.2007.1456
日期:2007.12.5
A highly efficient method by using benzenesulfonic anhydride (BSA) in the presence of 4-(dimethylamino)pyridine (DMAP) to synthesize carboxamides from various carboxylic acids and amines including ...
Tetrakis(pyridin-2-yloxy)silane [Si(OPy)4] is easily prepared by trans-silylation between silicon tetrachloride and trimethyl(pyridin-2-yloxy)silane in the molar ratio of 1:4. This novel reagent is effectively employed as a mild dehydrating reagent in forming various carboxamides from the corresponding carboxylic acids and amines that involve secondary or tertiary alkyl substituted ones in good to high yields without using any basic promoters such as tertiary amines or 4-(dimethylamino)pyridine.
Efficient Method for Dehydration Condensation Using Pyridine-3-carboxylic Anhydride (3-PCA): Synthesis of Carboxamides from Nearly Equimolar Amounts of Carboxylic Acids and Amines
作者:Setsuo Funasaka、Teruaki Mukaiyama
DOI:10.1246/cl.2007.658
日期:2007.5.5
A highly useful method for the preparation of carboxamides from various carboxylic acids and amines is established by using pyridine-3-carboxylic anhydride (3-PCA) in the presence of 4-(dimethylami...
Ruthenium-Catalyzed Redox-Neutral and Single-Step Amide Synthesis from Alcohol and Nitrile with Complete Atom Economy
作者:Byungjoon Kang、Zhenqian Fu、Soon Hyeok Hong
DOI:10.1021/ja404695t
日期:2013.8.14
A completely atom-economical and redox-neutral catalytic amide synthesis from an alcohol and a nitrite is realized. The amide C-N bond is efficiently formed between the nitrogen atom of nitrile and the alpha-carbon of alcohol, with the help of an N-heterocyclic carbene-based ruthenium catalyst, without a single by-product. A utility of the reaction was demonstrated by synthesizing C-13 or N-15 isotope-labeled amides without involvement of any separate reduction and oxidation step.