Ligand-tuned cobalt-containing coordination polymers and applications in water
作者:Rong Tao、Yike Yang、Haiyan Zhu、Xinyu Hu、Dawei Wang
DOI:10.1039/d0gc02341h
日期:——
could promote the alkylation of ketones with alcohols and alcohols with alcohols, while Co-NCIA was effective for the synthesis of 1-benzyl-2-aryl-1H-benzo[d]imidazoles from various phenylenediamine and benzyl alcohols through borrowing hydrogen and dehydrogenation strategies. Other mechanism explorations, such as deuterium labeling experiments and a kinetics study, were conducted to better understand
A gold-catalyzedoxidation of arylallenes to form alpha-diketones and aldehydes in good yields is presented. Further directed synthesis of quinoxalines and benzimidazoles, via the condensation of the resulting alpha-diketones and aldehydes with benzene-1,2-diamine, was achieved in high yields.
BINAP-copper supported by hydrotalcite as an efficient catalyst for the borrowing hydrogen reaction and dehydrogenation cyclization under water or solvent-free conditions
作者:Zhaojun Xu、Xiaoli Yu、Xinxin Sang、Dawei Wang
DOI:10.1039/c8gc00557e
日期:——
A BINAP-Cu system supported by hydrotalcite has been developed and proved to be a highlyefficientcatalyst for the atom-efficient and green borrowing hydrogen reaction and dehydrogenative cyclization. This BINAP-Cu complex supported by hydrotalcite is highly air-stable and can be recycled at least five times under solvent-free conditions. Notably, 1-benzyl-2-aryl-1H-benzo[d]imidazole derivatives could
已经开发了由水滑石支撑的BINAP-Cu系统,并被证明是一种高效的催化剂,用于原子效率高的绿色借入氢反应和脱氢环化反应。这种由水滑石负载的BINAP-Cu络合物具有高度的空气稳定性,在无溶剂条件下可以循环至少五次。值得注意的是,第一次以水为溶剂仅一步即可由醇合成1-苄基-2-芳基-1 H-苯并[ d ]咪唑衍生物。这为在水或无溶剂条件下以高收率合成官能化的胺,酮和1-苄基-2-芳基-1 H-苯并[ d ]咪唑衍生物提供了一种更加绿色有效的催化方法。
An efficient facile and one-pot synthesis of benzodiazepines and chemoselective 1,2-disubstituted benzimidazoles using a magnetically retrievable Fe<sub>3</sub>O<sub>4</sub> nanocatalyst under solvent free conditions
作者:Ramen Jamatia、Mithu Saha、Amarta Kumar Pal
DOI:10.1039/c3ra47860b
日期:——
benzimidazole derivatives were synthesized by the condensation reaction of o-phenylenediamine with ketones and aryl aldehydes using Fe3O4 nanoparticles as a recyclable catalyst undersolventfreeconditions. This synthetic approach eliminates the use of toxic organic solvents with the added benefit of easy separation and reusability of the catalyst without compromising the yield or purity which makes
在无溶剂条件下,使用Fe 3 O 4纳米颗粒作为可循环利用的催化剂,通过邻苯二胺与酮和芳基醛的缩合反应,合成了苯二氮卓和化学选择性的1,2-二取代的苯并咪唑衍生物。这种合成方法消除了有毒有机溶剂的使用,并具有易于分离和催化剂可重复使用而又不损害产率或纯度的额外好处,这使该过程变得绿色。
Nano ZnO Catalyzed One-Pot Synthesis of Benzimidazoles from o-Phenylenediamine with Aldehydes
作者:Kun Qian、Xin Nian、Guan-Ming Zhu、Dong Mei Cui、Chen Zhang
DOI:10.14233/ajchem.2015.19076
日期:——
Nano-ZnO was found to be a highly efficient and reusable heterogeneous catalyst for the one-pot synthesis of substituted benzimidazoles from aromatic aldehydes with o-phenylenediamine in moderate to good yield. The spent catalyst can be easily recovered and reused for five cycles with consistent activity.