Hantzsch adducts with different substituents at the C-4 position were synthesized through multicomponent reactions by using citric or lactic acid as catalysts. To the best of our knowledge, this is the first report on the synthesis of such a class of compounds based on multicomponent reactions catalyzed by non-toxic organic acids. The potential to scavenge reactive nitrogen/oxygen species (RNS/ROS) and
La2O3/TFE: An efficient system for room temperature synthesis of Hantzsch polyhydroquinolines
作者:Sunil U. Tekale、Vijay P. Pagore、Sushama S. Kauthale、Rajendra P. Pawar
DOI:10.1016/j.cclet.2014.03.037
日期:2014.8
found to be an efficient system for the one-pot, four-componentsynthesis of Hantzsch polyhydroquinoline derivatives from aromatic aldehydes, dimedone, ethyl acetoacetate and ammonium acetate at ambient temperature. The catalyst is heterogeneous and reusable, hence can be separated easily and reused. The present method is featured by mild reaction conditions, use of heterogeneous catalyst, non-chromatographic
发现氧化镧(La 2 O 3)与2,2,2-三氟乙醇(TFE)的组合是从芳族醛,二甲酮,乙酰乙酸乙酯单锅四组分合成Hantzsch聚氢喹啉衍生物的有效系统。和乙酸铵在环境温度下。该催化剂是非均质的和可重复使用的,因此可以很容易地分离和再利用。本方法的特点是反应条件温和,使用非均相催化剂,无色谱纯化,反应时间短,收率高,是合成聚氢喹啉的一种有吸引力的途径。
Introduction of a novel nanosized N-sulfonated Brönsted acidic catalyst for the promotion of the synthesis of polyhydroquinoline derivatives via Hantzsch condensation under solvent-free conditions
After the characterization of this reagent, it was efficiently used for the promotion of the one-potsynthesis of hexahydroquinolines via one-potfour-component condensation of aryl aldehydes, 1,3-cyclohexadione derivatives, β-ketoesters and ammonium acetate under solvent-free conditions. The procedure gave the products in excellent yields in short reaction times and good to high yields. Also this catalyst
在这项研究中,4,4'-(1-丁烷1,4-丁二)双(1-磺基-1,4-二氮杂双环[2.2.2]辛烷-1,4-二鎓)四氯化物(NS-C 4(DABCO-使用不同类型的方法,包括FT-IR,1 H NMR,13 C NMR,质量,XRD,TGA,SEM和AFM分析,制备并表征了作为新型纳米级N-磺酸的SO 3 H)2)·4Cl)。该试剂的特征后,将其有效地用于促进一锅合成hexahydroquinolines的经由在无溶剂条件下,一锅四组分缩合芳基醛,1,3-环己二酮衍生物,β-酮酸酯和乙酸铵。该程序在短的反应时间内以优异的产率获得了产物,并且从良好的产率到高的产率。同样,该催化剂可以重复使用几次而不会损失其催化活性。
Magnetic nickel ferrite nanoparticles as an efficient catalyst for the preparation of polyhydroquinoline derivatives under microwave irradiation in solvent-free conditions
作者:Hamideh Ahankar、Ali Ramazani、Sang Woo Joo
DOI:10.1007/s11164-015-2163-6
日期:2016.3
Abstract An easy and convenient method is reported for the synthesis of polyhydroquinoline derivatives in solvent-freeconditionsundermicrowaveirradiation in the presence of magnetic nickel ferrite nanoparticles (NiFe2O4 MNPs) as a catalyst. Excellent yields (82–94 %), facile work-up, achieving high purity of products via simple recrystallization, and short reaction times (2–5 min) are some advantages
摘要 报道了在磁性镍铁氧体纳米粒子(NiFe 2 O 4 MNPs)作为催化剂存在下,无溶剂条件下微波辐射下合成多氢喹啉衍生物的简便方法。该方法的一些优点是出众的收率(82–94%),后处理简便,通过简单的重结晶即可获得高纯度的产品以及较短的反应时间(2–5分钟)。值得注意的是,催化剂被磁性去除,活性没有明显损失,可以重复使用几次。 图形概要
Dihydropyridines as potential α-amylase and α-glucosidase inhibitors: Synthesis, in vitro and in silico studies
Dihydropyridine derivatives 1-31 were synthesized via one-pot solvent free condition and screened for in vitro against alpha-amylase and alpha-glucosidase enzyme. The synthetic derivatives 1-31 showed good alpha-amylase inhibition in the range of IC50 = 2.21 +/- 0.06-9.97 +/- 0.08 mu M, as compared to the standard drug acarbose (IC50 = 2.01 +/- 0.1 mu M) and alpha-glucosidase inhibition in the range of IC50 = 2.31 +/- 0.09-9.9 +/- 0.1 mu M as compared to standard acarbose (IC50 = 2.07 +/- 0.1 mu M), respectively. To determine the mode of binding interactions of synthetic molecules with active sites of enzyme, molecular docking studies were also performed. Different spectroscopic techniques such as H-1, C-13 NMR, EI-MS, and HREI-MS were used to characterize all the synthetic compounds.