Organocatalytic Green Approach Towards the Fabrication of Fused Benzo
<i>N</i>
,
<i>N</i>
‐containing Heterocycles Facilitated by Ultrasonic Irradiation
作者:Ridaphun Nongrum、George Kupar Kharmawlong、Jims World Star Rani、Noimur Rahman、Arup Dutta、Rishanlang Nongkhlaw
DOI:10.1002/jhet.3680
日期:2019.10
transformations in organic synthesis offers a significant potential environmental benefit. This article reports the exploration of meglumine, a nontoxic and biodegradable amino sugar, as an organocatalyst for the synthesis of biologically active 1H‐dibenzo[b,e][1,4]diazepin‐1‐ones, highly regioselective benzimidazole derivatives and derivatives of quinoxalines. Operational simplicity, mild reaction conditions, shorter
Correction: Green synthesis of 1,4-benzodiazepines over La<sub>2</sub>O<sub>3</sub> and La(OH)<sub>3</sub> catalysts: possibility of Langmuir–Hinshelwood adsorption
Correction for ‘Green synthesis of 1,4-benzodiazepines over La2O3 and La(OH)3 catalysts: possibility of Langmuir–Hinshelwood adsorption’ by Archana Singh et al., RSC Adv., 2016, 6, 103455–103462.
Silica-supported NiO nanocomposites prepared via a sol–gel technique and their excellent catalytic performance for one-pot multicomponent synthesis of benzodiazepine derivatives under microwave irradiation
Heterogeneous and versatile NiO–SiO2 NCs were synthesized by a sol–gel technique and used as a catalyst for the one-pot multicomponent synthesis of benzodiazepine derivatives (4a–u) from a mixture of o-phenylenediamine, aromatic aldehydes and dimedone undermicrowaveirradiation. Tetraethyl orthosilicate (TEOS) was used as a source of SiO2 for the creation of the NiO–SiO2 NCs. This catalytic protocol
通过溶胶-凝胶技术合成了多相且用途广泛的NiO-SiO 2 NCs,并用作微波催化邻苯二胺,芳族醛和二甲基酮的混合物单锅多组分合成苯二氮卓衍生物(4a-u)的催化剂辐射。原硅酸四乙酯(TEOS)被用作SiO 2的来源,用于产生NiO–SiO 2NCs。该催化方案具有许多优点,例如后处理简单,廉价的前体,短的反应时间,高产率和高表面积。通过元素分析,扫描电子显微镜(SEM),透射电子显微镜(TEM),X射线衍射(XRD),能量色散X射线光谱(EDAX)和傅里叶变换表征了所制备纳米催化剂的结构和形貌。红外(FTIR)光谱。进行1 H NMR,13 C NMR和MS分析以确认合成的化合物(4a–u)。此外,NiO-SiO 2 NCs出色的催化性能使催化剂易于从反应混合物中分离出来,而不会明显降低催化活性。
Synthesis and characterization of CoFe2O4@SiO2@NH-NH2-PCuW as an acidic nano catalyst for the synthesis of 1,4-benzodiazepines and a powerful dye remover
作者:Ali Savari、Fariba Heidarizadeh、Nahid Pourreza
DOI:10.1016/j.poly.2019.03.046
日期:2019.7
novel magnetic heterogeneous nanocatalyst CoFe2O4@SiO2@NH-NH2-PCuW was synthesized and characterized. This powerfulcatalyst possesses Bronsted and Lewis acid properties. The presence of Cu enhances the acidity of this catalyst because of the increase in the electron deficiency of polyoxometalate. It was successfully applied for the easy and efficient one-pot synthesis of 1,4-benzodiazepine derivatives
A nickel nanoparticle engineered CoFe<sub>2</sub>O<sub>4</sub>@GO–Kryptofix 22 composite: a green and retrievable catalytic system for the synthesis of 1,4-benzodiazepines in water
作者:Roya Mozafari、Mohammad Ghadermazi
DOI:10.1039/d0ra01671c
日期:——
In this study, a competent and efficient methodology for the synthesis of benzodiazepine over magnetically retrievable novel CoFe2O4@GO–K 22 anchored Ni is reported.