Solvent- and catalyst-free <i>N</i>-formylations of amines at ambient condition: Exploring the usability of aromatic formates as <i>N</i>-formylating agents
作者:Shaikh Batuta、Naznin Ara Begum
DOI:10.1080/00397911.2016.1255334
日期:2017.1.17
and catalyst-free N-formylation protocol has been developed for amines (1s–21s) where aromaticformates (1r–6r) were used as the N-formylating agents. The amine substrates include both primary and secondary aromaticamines (1s–19s) as well as aliphatic amine (20s) and a primary amide (21s). Structures of both the aromatic formate and amine components strongly influenced the rate of the reaction and yield
Supported Palladium Nanoparticles Catalyzed Reductive Carbonylation of Nitroarenes to <i>N</i>
-Arylformamides
作者:Vandna Thakur、Ajay Kumar、Nishtha Sharma、Arun K. Shil、Pralay Das
DOI:10.1002/adsc.201700944
日期:2018.2.1
A facile reductive carbonylation reaction of nitroarenes to N‐arylformamide synthesis was investigated under polymer supported palladium (Pd@PS) nanoparticles catalyzed conditions. Dual role of oxalic acid dihydrate ((CO2H)2 ⋅ 2H2O) as H2 source for hydrogenation and CO source for carbonylation reaction for desired products synthesis was critically investigated under favorable DMF solvent conditions
Synthesis of sugar-derived isoselenocyanates, selenoureas, and selenazoles
作者:Óscar López、Susana Maza、Víctor Ulgar、Inés Maya、José G. Fernández-Bolaños
DOI:10.1016/j.tet.2009.01.038
日期:2009.3
Aryl, alkyl, and sugar-derived isoselenocyanates were prepared by a one-pot procedure starting from the corresponding formamides, using triphosgene as a dehydrating agent, triethylamine, and black selenium powder. The preparation of sugar selenoureas by coupling of O-protected sugar-derived isoselenocyanates with different amines, and by coupling of unprotected glycopyranosyl amines with phenyl isoselenocyanate
Catalyst-Free Transamidation of Aromatic Amines with Formamide Derivatives and Tertiary Amides with Aliphatic Amines
作者:Jiawen Yin、Jingyu Zhang、Changqun Cai、Guo-Jun Deng、Hang Gong
DOI:10.1021/acs.orglett.8b03542
日期:2019.1.18
A simple catalyst- and promoter-free protocol has been developed for the transamidation of weakly nucleophilic aromatic amines with formamide derivatives and low-reactivity tertiary amides with aliphatic amines. This strategy is advantageous because no catalyst or promoters are needed, no additives are required, separation and purification is easy, and the reaction is scalable. Significantly, this