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。
Microwave-assisted synthesis of 11-substituted-3,3-dimethyl-2,3,4,5,10,11-hexahydrodibenzo[b,e][1,4]diazepin-1-one derivatives catalysed by silica supported fluoroboric acid as potent antioxidant and anxiolytic agents
benzodiazepines on the central nervous system, we have synthesized a novel series of benzodiazepine derivatives as antioxidant and anxiolytic agents. All the compounds were obtained in good yield by facile synthesis. To check their antioxidant potential, DPPH (2,2-diphenyl-1-picrylhydrazyl) free radical scavenging assay was performed. Among all the synthetics seven derivatives (SD-3, SD-5, SD-7, SD-14, SD-18
An efficient, environmentally benign, and solvent-free protocol for the synthesis of 4-substituted 1,5-benzodiazepines catalyzed by reusable sulfated polyborate
作者:Krishna S. Indalkar、Manisha S. Patil、Ganesh U. Chaturbhuj
DOI:10.1016/j.tetlet.2017.10.030
日期:2017.11
developed for the one-pot solvent-free synthesis of 4-substituted-1,5-benzodiazepines via three-component reaction of o-phenylenediamine, dimedone with a variety of aldehydes catalyzed by sulfated polyborate. The major advantages of the present method are good to excellent yields, shorter reaction time, simple experimental procedure, easy workup, solvent-free reaction condition, recyclability of the
Practical carbocatalysis by graphene oxide nanosheets in aqueous medium towards the synthesis of diversified dibenzo[1,4]diazepine scaffolds
作者:Nazia Kausar、Prasun Mukherjee、Asish R. Das
DOI:10.1039/c6ra17520a
日期:——
Metal free green protocol in aqueous medium. Use of GO nanosheets as exclusive heterogeneous catalyst. Almost intact catalytic activity upto the 5th run. Mild reaction conditions preserve sensitive structural moeities.