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-Formylsaccharin, a very cheap reagent, has been revealed to be an efficient and chemoselective formylatingagent of amines.
N-甲酰糖精是一种非常便宜的试剂,已被证明是一种有效且具有化学选择性的胺甲酰化剂。
Amine modified mesoporous Al<sub>2</sub>O<sub>3</sub>@MCM-41: an efficient, synergetic and recyclable catalyst for the formylation of amines using carbon dioxide and DMAB under mild reaction conditions
作者:Deepak B. Nale、Dharitri Rath、K. M. Parida、Aravind Gajengi、Bhalchandra M. Bhanage
DOI:10.1039/c5cy02277k
日期:——
This work reports an amine modified meso Al2O3@MCM-41, particularly the ordered mesoporous silica, as a catalyst for the formylation of amines with carbondioxide (CO2) and with dimethylamine-borane (DMAB) as a green reducing source. This newly developed catalytic system represents a heterogeneous and environmentally benign protocol. Besides this, the catalyst could be reused for five consecutive cycles
这项工作报告了胺改性的介孔Al 2 O 3 @ MCM-41,特别是有序介孔二氧化硅,可作为胺与二氧化碳(CO 2)和二甲胺-硼烷(DMAB)作为绿色还原源进行甲酰化的催化剂。这种新开发的催化系统代表了一种异构且对环境无害的方案。除此之外,该催化剂可以连续五个循环使用,而对甲酰胺合成的催化活性没有任何重大损失。胺改性的内消旋Al 2 O 3MCM-41催化剂具有高角度和低角度XRD,程序升温脱附(TPD),BET表面积,TGA / DTA和FT-IR分析技术的特点。研究了各种反应参数(如温度,CO 2压力,时间以及底物与DMAB的比例)对合成甲酰胺的影响。所开发的方案可适用于生物活性化合物中最重要的关键中间体的合成,例如福莫特罗,奥利司他,白细胞变蛋白和艾拉莫德。
UiO-66 as an efficient catalyst for N-formylation of amines with CO2 and dimethylamine borane as a reducing agent
作者:Vishal V. Phatake、Ashish A. Mishra、Bhalchandra M. Bhanage
DOI:10.1016/j.ica.2019.119274
日期:2020.2
effective way to make the best use of CO2, is the reductive formylation of amines, as formamides have many applications in industry. A new protocol has been developed for reductive N-formylation of amines with CO2 as a C1 carbon source and DMAB (Dimethylamine borane) as a reducing agent in the presence of Zr-containing metal–organic framework (MOF) as an efficient, heterogeneous recyclable catalyst.
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