Ruthenium-Catalyzed Oxidative Amidation of Alkynes to Amides
作者:Andrea Álvarez-Pérez、Miguel A. Esteruelas、Susana Izquierdo、Jesús A. Varela、Carlos Saá
DOI:10.1021/acs.orglett.9b01993
日期:2019.7.5
Complex CpRuCl(PPh3)2 catalyzes reactions of terminal alkynes with 4-picoline N-oxide and primary and secondary amines to afford the corresponding amides. The reactions occur in chlorinated solvent and aqueous medium, showing applications in peptide chemistry. Stoichiometric studies reveal that the true catalysts of the processes are the vinylidene cations [CpRu(═C═CHR)(PPh3)2]+ which are oxidized
Amide Bond Formation through Iron-Catalyzed Oxidative Amidation of Tertiary Amines with Anhydrides
作者:Yuanming Li、Lina Ma、Fan Jia、Zhiping Li
DOI:10.1021/jo400804p
日期:2013.6.7
for synthesis of tertiary amides from readily available tertiary amines and anhydrides in the presence of FeCl2 as catalyst and tert-butyl hydroperoxide in water (T-Hydro) as oxidant. Mechanistic studies indicated that the in situ-generated α-amino peroxide of tertiary amine and iminium ion act as key intermediates in this oxidative transformation.
Rhodium-Catalyzed Oxygenative Addition to Terminal Alkynes for the Synthesis of Esters, Amides, and Carboxylic Acids
作者:Insu Kim、Chulbom Lee
DOI:10.1002/anie.201303669
日期:2013.9.16
A gem of a couple: The title reaction of terminalalkynes with O and N nucleophiles proceeds in the presence of [Rh(cod)Cl}2], P(4‐FC6H4)3, and 4‐picoline N‐oxide. Alcohols, amines, and water add to the terminalalkynes to give esters, amides, and carboxylic acids, respectively. The reaction involves formation of a rhodium vinylidene, oxidation to a ketene by oxygen transfer, and nucleophilic addition
一对夫妇的宝石:与O和N亲核试剂在[的Rh(COD)氯}存在所得末端炔烃的标题反应2 ],P(4-FC 6 H ^ 4)3,和4-甲基吡啶ñ -氧化物。醇,胺和水加到末端炔烃中,分别得到酯,酰胺和羧酸。该反应包括形成亚乙烯基铑,通过氧转移氧化成烯酮,以及亲核加成。
Green and efficient choline hydroxide-promoted C(sp3)-H selenation of arylacetamides at room temperature
A novel, efficient and environmentally friendly synthetic method has been developed for C(sp)-H selenation of arylacetamides with readily available diselenides as selenating reagents at room temperature. This protocol is applicable to a list of wide-ranging arylacetamides and diselenides, and provides various α-selenylated aryl amide derivatives with high yield using choline hydroxide (ChOH) as a green