Efficiency of NaHSO4 modified periodic mesoporous organosilica magnetic nanoparticles as a new magnetically separable nanocatalyst in the synthesis of [1,2,4]triazolo quinazolinone/pyrimidine derivatives
mesoporous organosilica magneticnanoparticles (γ-Fe2O3@Ph-PMO-NaHSO4) as a new acidic magneticallyseparablenanocatalyst was successfully prepared in three steps: (i) preparation of γ-Fe2O3 nanoparticles by a precipitation method, (ii) synthesis of an organic-inorganic periodic mesoporous organosilica structure with phenyl groups on the surface of γ-Fe2O3 magneticnanoparticles (MNPs) and (iii) finally
Agar-entrapped sulfonated DABCO: Agelly acidic catalyst for the acceleration of one-pot synthesis of 1,2,4-triazoloquinazolinone and some pyrimidine derivatives
After preparation and identification this new reagent is used as an efficient and environmentally safe catalyst for the preparation of 1, 2, 4-triazoloquinazolinone and somepyrimidinederivatives. This method is accompanied with some superiorities such as, simple operation, mild and green conditions, use of low cost and non-hazardous natural material, short reaction times, easy preparation methods and
Morpholine stabilized on nano silica sulfuric acid: a novel reusable catalyst for the synthesis of triazoloquinazoline and polyhydroquinoline derivatives
the prepared reagent was investigated in the promotion of the synthesis of triazoloquinazoline derivatives. This reagent was also efficiently able to catalyze the synthesis of a variety of polyhydroquinoline derivatives. In both of the studied reactions, the procedure lead to the products with excellent yields during very short reaction times. Also, the catalyst was reused several times without considerable
在本研究中,吗啉在纳米二氧化硅硫酸上的稳定作用产生了一种新型的固体酸性试剂,使用傅里叶变换红外光谱 (FT-IR)、X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、透射电子显微镜 (TEM)、热重技术和能量色散 X 射线 (EDX)。接着,研究了所制备试剂在促进三唑并喹唑啉衍生物合成中的催化能力。该试剂还能够有效地催化多种聚氢喹啉衍生物的合成。在所研究的两个反应中,该程序在非常短的反应时间内产生具有优异产率的产物。此外,催化剂多次重复使用,其效率没有明显损失。
An efficient, one-pot three components synthesis of [1,2,4] triazoloquinazolinone derivatives using anthranilic acid as green catalyst
A simple, efficient and convenient approach has been reported for the synthesis of quinazolines by the condensation of 3-amino, 1,2,4-triazole with dimedone and different aromatic aldehydes in the presence of anthranilic acid as a catalyst through a one-pot reaction. The high yield, at low cost, with no need of chromatographic separation, and the environmentally friendly catalyst are the prominent
A wide variety of quinazolinone derivatives have been synthesized by condensation of 3-amino-1,2,4-trazole and 2-aminobenzimidazole as amine sources, with aromatic aldehydes and dimedone in the presence of 10 mol % of molecular iodine in acetonitrile under reflux conditions through one-pot reactions. Environmental acceptability, low cost, no need of chromatographic separation, and high yields are the important features of this protocol. (C) 2013 Elsevier Ltd. All rights reserved.