Tetracoordinate borates as catalysts for reductive formylation of amines with carbon dioxide
作者:Xiaolin Jiang、Zijun Huang、Mohamed Makha、Chen-Xia Du、Dongmei Zhao、Fang Wang、Yuehui Li
DOI:10.1039/d0gc01741h
日期:——
We report sodium trihydroxyaryl borates as the first robust tetracoordinate organoboron catalysts for reductive functionalization of CO2. These catalysts, easily synthesized from condensing boronic acids with metal hydroxides, activate main group element–hydrogen (E–H) bonds efficiently. In contrast to BX3 type boranes, boronic acids and metal-BAr4 salts, under transition metal-free conditions, sodium
N-formylation of amine using graphene oxide as a sole recyclable metal-free carbocatalyst
作者:Juan Ma、Jingyu Zhang、Xiao Zhou、Jiawei Wang、Hang Gong
DOI:10.1007/s13738-018-1471-3
日期:2018.12
AbstractGraphene oxide (GO), an inexpensive, environment-friendly, and metal-free carbocatalyst, used for the N-formylation of amines is developed. In this reaction, GO shows good activity, selectivity, and recyclability. This strategy has an array of advantages, such as being metal free, without additive, wide-scope protocol, scalable with a low catalyst loading of 3 wt%, use of readily available
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
Cobalt(II)-Catalyzed <i>N</i>
-Acylation of Amines through a Transamidation Reaction
作者:Juan Ma、Feng Zhang、Jingyu Zhang、Hang Gong
DOI:10.1002/ejoc.201800253
日期:2018.9.23
An efficient, practical, CoII‐catalyzed N‐acylation reaction of various amines using readily available and inexpensive DMF and other amides as carbonyl sources is described.
Recyclable Oxofluorovanadate‐Catalyzed Formylation of Amines by Reductive Functionalization of CO
<sub>2</sub>
with Hydrosilanes
作者:Shanxuan Wu、Zijun Huang、Xiaolin Jiang、Fachao Yan、Yuehui Li、Chen‐Xia Du
DOI:10.1002/cssc.202100117
日期:2021.4.9
Various amines are transformed into the desired N‐formylated products in moderate to excellent yields at room temperature in the presence of phenylsilane. Mechanistic studies based on in situ infrared spectroscopy suggest a reaction pathway initiated through F−Si interactions. The activated phenylsilane allows for CO2 insertion to produce phenylsilyl formate, which undergoes attack by the amine to generate