Dihydropyrimidones: As novel class of β-glucuronidase inhibitors
作者:Farman Ali、Khalid Mohammed Khan、Uzma Salar、Sarosh Iqbal、Muhammad Taha、Nor Hadiani Ismail、Shahnaz Perveen、Abdul Wadood、Mehreen Ghufran、Basharat Ali
DOI:10.1016/j.bmc.2016.06.002
日期:2016.8
Dihydropyrimidones 1–37 were synthesized via a ‘one-pot’ three component reaction according to well-known Biginelli reaction by utilizing Cu(NO3)2·3H2O as catalyst, and screened for their in vitro β-glucuronidase inhibitory activity. It is worth mentioning that amongst the active molecules, compounds 8 (IC50 = 28.16 ± .056 μM), 9 (IC50 = 18.16 ± 0.41 μM), 10 (IC50 = 22.14 ± 0.43 μM), 13 (IC50 = 34.16 ± 0
The present application relates to compounds and methods for treating pain, incontinence and other conditions.
本申请涉及化合物和治疗疼痛、失禁和其他疾病的方法。
US8178542B2
申请人:——
公开号:US8178542B2
公开(公告)日:2012-05-15
Niobium Oxides as Heterogeneous Catalysts for Biginelli Multicomponent Reaction
作者:Letícia Gomes do Nascimento、Isabela Milhomem Dias、Guilherme Botelho Meireles de Souza、Isabela Dancini-Pontes、Nádia Regina Camargo Fernandes、Paulo Sérgio de Souza、Guilherme Roberto de Oliveira、Christian Gonçalves Alonso
DOI:10.1021/acs.joc.0c01167
日期:2020.9.4
showed that niobiumoxides have the potential to be used as catalysts because of high crystallinity and large surface area. Among the tested catalysts, Nb2O5 chemically treated (Nb2O5/T) showed the best catalytic performance. In the absence of solvents, 94% yield of DHPMs was achieved. Also, Nb2O5/T can be reused three times without a significant yield decrease. Additionally, a feasible reaction pathway
这项研究报告了用于Biginelli多组分反应的简单,可重复使用和可回收的铌基异相催化剂。研究了不同的催化剂制备方法。为此,对HY-340(Nb 2 O 5 · n H 2 O)和Nb 2 O 5进行了化学和/或热处理,并研究了其作为生产二氢嘧啶酮(DHPM)的催化剂。通过扫描电子显微镜,高分辨率透射电子显微镜,傅立叶变换红外光谱,X射线衍射,程序升温的NH 3脱附,N 2的吸附/脱附来表征催化剂。-196°C下进行热重分析和差热分析。表征结果表明,由于高结晶度和大表面积,铌氧化物具有用作催化剂的潜力。在这些测试的催化剂,NB 2 ö 5化学处理(NB 2 ø 5 / T)表现出最好的催化性能。在没有溶剂的情况下,DHPM的收率达到94%。同样,Nb 2 O 5 / T可以重复使用三次,而不会显着降低产量。另外,基于使用铌基催化剂的DHPM合成的Knoevenagel机理,提出了可行的反应途径。