A direct amidation of carboxylicacids with tertiary amines could be carried out in the presence of the Ph3P–I2 activator. With an appropriate reagent addition sequence, a range of carboxylicacids including aliphatic, allylic, and aromatic acids could be converted into their corresponding tertiary amides under mild conditions without requirement of metal catalysis.
Tungsten-Catalyzed Transamidation of Tertiary Alkyl Amides
作者:Fang-Fang Feng、Xuan-Yu Liu、Chi Wai Cheung、Jun-An Ma
DOI:10.1021/acscatal.1c01840
日期:2021.6.18
chloride as a catalyst and chlorotrimethylsilane as an additive. The highly electrophilic and oxophilic tungsten catalyst enables the selective scission of a C–N bond of tertiary alkyl amides to effect transamidation of a myriad of structurally and electronically diverse tertiary alkyl amides and amines. Mechanistic study implies that the synergistic effect of the catalyst and the additive could pronouncedly
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
Palladium-Catalyzed Hydroaminocarbonylation of Alkenes with Amines: A Strategy to Overcome the Basicity Barrier Imparted by Aliphatic Amines
作者:Guoying Zhang、Bao Gao、Hanmin Huang
DOI:10.1002/anie.201502405
日期:2015.6.22
A novel and efficient palladium‐catalyzed hydroaminocarbonylation of alkenes with aminals has been developed under mild reaction conditions, and allows the synthesis of a wide range of N‐alkyl linear amides in good yields with high regioselectivity. On the basis of this method, a cooperative catalytic system operating by the synergistic combination of palladium, paraformaldehyde, and acid was established