Quinoline-2-carboimine copper complex immobilized on amine functionalized silica coated magnetite nanoparticles: a novel and magnetically retrievable catalyst for the synthesis of carbamates via C–H activation of formamides
作者:R. K. Sharma、Sriparna Dutta、Shivani Sharma
DOI:10.1039/c4dt03236e
日期:——
In the present study, we report the synthesis of a highly efficient and magnetically retrievable catalytic system (Cu-2QC@Am-SiO2@Fe3O4) through the covalent immobilization of quinoline-2-carboxaldehyde (2QC) on an amine functionalized silica coated ferrite nanosupport followed by metallation with copper acetate. The structure of the organic–inorganic hybrid nanomaterial has been confirmed using various
在本研究中,我们报告了一种高效且可磁回收的催化体系(Cu-2QC @ Am-SiO 2 @Fe 3 O 4)的合成)通过将喹啉-2-甲醛(2QC)共价固定在胺官能化的二氧化硅包覆的铁氧体纳米载体上,然后用乙酸铜金属化。有机-无机杂化纳米材料的结构已通过各种物理化学技术得到了证实,例如粉末X射线衍射(XRD),傅立叶变换红外光谱(FT-IR),扫描电子显微镜(SEM),透射电子显微镜(TEM) ,能量色散X射线光谱法(EDS),能量色散X射线荧光光谱法(ED-XRF),原子吸收光谱法(AAS),电感耦合等离子体光谱法(ICP)和振动样品磁强法(VSM)。所得的纳米催化剂在工业和药学上重要的氨基甲酸酯的合成中显示出显着的催化功效。在无溶剂条件下通过C–H活化甲酰胺。本方法的最重要的属性是催化剂可以简单地通过外部磁力来回收并重复使用几次而其活性没有任何显着降低。此外,为了确保纳米结构催化剂的固有
Synthesis, characterization and <i>in vitro</i> antimicrobial assessment of some novel 4<i>H</i>-1, 4-benzothiazines and their sulfone derivatives
Abstract In recent years, synthesis and biological evaluation of novel 4H-1,4-benzothiazines and their sulfone derivatives have gained momentum due to their medicinal and industrial importance. Our studies focused on the design and synthesis of new antimicrobial agents, and for this purpose a series of novel 4H-1,4-benzothiazines and their sulfone derivatives were synthesized and their in vitro antimicrobial
Sodium carbonate as a solid-phase reagent for the generation of acetylketene
作者:Kelcey Bell、Dhandapani V. Sadasivam、Indra Reddy Gudipati、Hua Ji、David Birney
DOI:10.1016/j.tetlet.2009.01.008
日期:2009.3
Reaction of a toluene solution of 3-oxobutanoyl chloride (14) with Na2CO3 in the presence of a catalytic amount of triethylamine at −78 °C generates a solution of acetylketene (2), the dimer of which was isolated. Acetylketene (2) was trapped with 2-propanone, 2-propanol, and ethyl vinyl ether.
3-氧代丁酰氯(14)的甲苯溶液与Na 2 CO 3在催化量的三乙胺的存在下,在-78°C下反应,生成乙酰基乙烯酮(2)溶液,将其二聚体分离出来。乙炔酮(2)被2-丙酮,2-丙醇和乙基乙烯基醚捕集。