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
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。
An Efficient Protocol for Formylation of Amines Using Carbon Dioxide and PMHS under Transition-Metal-Free Conditions
作者:Bhalchandra Bhanage、Deepak Nale
DOI:10.1055/s-0035-1561571
日期:——
green and simple base catalytic system was investigated for the formylation of amines using CO 2 and PMHS [poly(methylhydrosiloxane)] under mild reaction conditions. This reaction proceeds smoothly without additives and furnishes the corresponding N-formylated products from both the 1° and the 2° aliphatic as well as aromaticamines in good to excellent yields.
Carbazole derivatives and their use as neuropeptide y5 receptor ligands
申请人:——
公开号:US20040067999A1
公开(公告)日:2004-04-08
Compounds of formula (I): are described wherein R
1
-R
6
and m are as defined within. Processes for their preparation and their use as NPY 5 inhibitors is described.
are useful starting materials for pharmaceutical syntheses. Although various synthetic methods have been documented in this regard, the use of N-formylcarbazole as a formylation reagent for amines has not yet been reported. We report here the first examples of the use of N-formylcarbazole for the formylation of amines. The characteristic reactivity of N-formylcarbazole enables the selective formylation