A Novel PdCl2/ZrO2–SO2−4 Catalyst for Synthesis of Carbamates by Oxidative Carbonylation of Amines
作者:Feng Shi、Youquan Deng、Tianlong SiMa、Hongzhou Yang
DOI:10.1006/jcat.2001.3350
日期:2001.10
At 170°C and ca. 4.0 MPa, oxidative carbonylation of aromatic amines to synthesize corresponding carbamates over a novel PdCl2/ZrO2–SO2−4 catalyst could proceed with high conversion and selectivity.
An efficient reduction of N -substituted carbonylimidazolides into formamides by NaBH 4
作者:Zhiyong Chen、Yiming Cao、Zeyu Tian、Xuan Zhou、Wenjin Xu、Jia Yang、Hanbing Teng
DOI:10.1016/j.tetlet.2017.04.072
日期:2017.5
A novel, simple and versatile protocol was investigated for highly efficient synthesis of formamides through reducing N-substituted carbonylimidazolides by NaBH4 under mild reaction conditions. By this method, not only carboxylic acids or isocyanates, but also amines can readily access formamides with high yields.
We here report a new protocol for the formylation of various amines, primary or secondary, aromatic or alkyl, cyclic or linear, mono- or di-amine, with dimethylformamide (DMF) as the formylation reagent to obtain the corresponding formamides in good to excellent yields over CeO2 catalyst. The reaction requires no homogeneous acidic or basic additives and is tolerant to water.
CN and NH Bond Metathesis Reactions Mediated by Carbon Dioxide
作者:Yehong Wang、Jian Zhang、Jing Liu、Chaofeng Zhang、Zhixin Zhang、Jie Xu、Shutao Xu、Fangjun Wang、Feng Wang
DOI:10.1002/cssc.201500318
日期:2015.6.22
reactions between amines and DMF to synthesize formamides. More than 20 amines, including primary, secondary, aromatic, and heterocyclic amines, diamines, and amino acids, are converted to the corresponding formamides with good‐to‐excellent conversions and selectivities under mild conditions. This strategy employs CO2 as a mediator to activate the amineunder metal‐free conditions. The experimental