Chemoselective Intermolecular Cross-Enolate-Type Coupling of Amides
作者:Daniel Kaiser、Christopher J. Teskey、Pauline Adler、Nuno Maulide
DOI:10.1021/jacs.7b08813
日期:2017.11.15
A new approach for the synthesis of 1,4-dicarbonyl compounds is reported. Chemoselective activation of amide carbonyl functionality and subsequent umpolung viaN-oxide addition generates an electrophilic enolonium species that can be coupled with a wide range of nucleophilic enolates. The method conveys broad functional group tolerance on both components, does not suffer from formation of homocoupling
Palladium-Catalyzed Hydrocarbonylative C–N Coupling of Alkenes with Amides
作者:Xibing Zhou、Guoying Zhang、Bao Gao、Hanmin Huang
DOI:10.1021/acs.orglett.8b00538
日期:2018.4.20
An efficient palladium-catalyzed hydrocarbonylative C–N coupling of alkenes with amides has been developed. The reaction was performed via hydrocarbonylation of alkenes, followed by acyl metathesis with amides. Both intermolecular and intramolecular reactions proceed smoothly to give either branched or linear amides in high turnover number (3500) with NH4Cl or NMP·HCl as a proton source under the palladium
Amidation Reaction of Carboxylic Acid with Formamide Derivative Using SO<sub>3</sub>·pyridine
作者:Shota Kawano、Kodai Saito、Tohru Yamada
DOI:10.1246/cl.171216
日期:2018.4.5
The amidation reaction of carboxylicacid derivatives was developed using sulfur trioxide pyridinecomplex (SO3·py) as a commercially available and easily handled oxidant. This method could be applied to the reaction of various aromatic and aliphatic carboxylicacids, including optically active ones, with formamide derivatives to afford the corresponding amides in good to high yields.
Palladium-Catalyzed Aminocarbonylation of Aliphatic Alkenes with<i>N,N</i>-Dimethylformamide as an In Situ Source of CO
作者:Thomas Seidensticker、Marc R. L. Furst、Robin Frauenlob、Johanna Vondran、Eckhard Paetzold、Udo Kragl、Andreas J. Vorholt
DOI:10.1002/cctc.201500824
日期:2015.12
The palladium‐catalyzed aminocarbonylation of aliphaticalkenes is presented for the first time without the need for external CO pressure. N,N‐dimethylformamide (DMF) is used as an in situsource of both the required carbon monoxide and the amine substrate. The applied palladium catalytic system is well‐known for a number of carbonylation reactions, including those with CO surrogates and tandem isomerizing
Deuteration of α,β-acetylenic esters, amides, or carboxylic acids without using deuterium gas: synthesis of 2,2,3,3-tetradeuterioesters, amides, or acids
作者:José M. Concellón、Humberto Rodrı́guez-Solla、Carmen Concellón
DOI:10.1016/j.tetlet.2004.01.051
日期:2004.3
simple, rapid, and nonhazardous deuteration of the C–C triple bond of α,β-acetylenicesters, amides, or acids by means of samarium diiodide in the presence of D2O, provides an efficient method for synthesizing 2,2,3,3-tetradeuterioesters, amides, or carboxylic acids, respectively. When H2O is used instead of D2O, saturated carboxylic esters, amides, or acids were isolated. A mechanism to explain these reduction