SBA-15-SO3H with a high surface area and high acid content was readily synthesized, characterized, and effectively used in the synthesis of some new and known pyrido[2,3-d:6,5-d′]dipyrimidinederivatives by condensation reaction of 6-aminouracil and different aldehydes under solvent-free conditions. The catalyst was reused for 6 runs without significant loss of its activity. Short reaction times, high
具有高表面积和高酸含量的酸性纳米催化剂SBA-15-SO 3 H易于合成,表征并有效地用于合成一些新的和已知的吡啶基[2,3- d:6,5- d '在没有溶剂的条件下,通过6-氨基尿嘧啶与不同醛的缩合反应生成] dipyrimidine衍生物。该催化剂可重复使用6次,而不会显着降低其活性。反应时间短,产物的产率高,无溶剂条件以及使用坚固且可重复使用的催化剂是本方法的优点。
Synthesis of pyrido[2,3‐
<i>d</i>
:5,6‐
<i>d</i>
′]dipyrimidines using CuFe
<sub>2</sub>
O
<sub>4</sub>
/KCC‐1/PMA as a novel and efficient nanocatalyst under solvent‐free conditions
作者:Seyyed Hojjat Sadeghi、Morteza Yaghoobi、Mohammad Ali Ghasemzadeh
DOI:10.1002/aoc.6771
日期:2022.8
In this research, the synthesis of pyrido[2,3-d:5,6-d′]dipyrimidines by CuFe2O4/KCC-1/PMA magnetic nanoparticles was reported. Synthesis of pyrido[2,3-d:5,6-d′]dipyrimidines was performed under solvent-free conditions with good to excellent yields. The prepared nanocatalyst was synthesized in three steps and also was characterized by Fourier transform infrared (FT-IR) spectroscopy, scanning electron
本研究报道了利用CuFe 2 O 4 /KCC-1/PMA磁性纳米粒子合成吡啶并[2,3- d :5,6 - d ']二嘧啶。吡啶并[2,3 - d :5,6 - d ']二嘧啶的合成是在无溶剂条件下进行的,收率良好。制备的纳米催化剂分三步合成,并通过傅里叶变换红外(FT-IR)光谱、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、能量色散X射线光谱(EDX)、X-射线衍射 (XRD)、振动样品磁强计 (VSM) 和 N 2吸附-解吸测量(Brunauer-Emmett-Teller [BET])分析。此外,CuFe 2 O 4 /KCC-1/PMA的可重复使用性研究表明,回收的催化剂可以多次使用。
A green synthesis of pyrimido[4,5-<i>b</i>]quinolines and pyrido[2,3-<i>d</i>]pyrimidines <i>via</i> a mechanochemical approach
for the synthesis of pyrimido[4,5-b]quinolines and pyrido[2,3-d]pyrimidines via a multicomponent reaction of 1,3 diketones (dimedone, barbituric acid, and Meldrum's acid), 6-aminouracil and aromatic aldehyde, through mechanochemical synthesis using a ball-mill. This transformation involves a one pot, catalyst-free, and solvent-free pathway to develop the desired products under mild reaction conditions
One‐pot synthesis of pyrido[2,3‐d:5,6‐d′]dipyrimidines using CoFe
<sub>2</sub>
O
<sub>4</sub>
@SiO
<sub>2</sub>
‐PA‐CC‐guanidine‐SA magnetic nanoparticles in water
作者:Hedieh Rostami、Lotfi Shiri
DOI:10.1002/aoc.6293
日期:2021.10
In this study, the synthesis of pyrido[2,3‐d:5,6‐d′]dipyrimidines using CoFe2O4@SiO2‐PA‐CC‐guanidine‐SA magnetic nanoparticles with excellent yields has been reported. Pyrido[2,3‐d:5,6‐d′]dipyrimidines were synthesized from the four‐component reaction of barbituric acid derivatives, benzaldehyde derivatives and ammonium acetate in water at room temperature. The synthesized catalyst was identified using Fourier‐transform infrared spectroscopy (FT‐IR), scanning electron microscopy (SEM), energy‐dispersive X‐ray spectroscopy (EDX), X‐ray powder diffraction (XRD), thermogravimetric analysis (TGA) and vibrating sample magnetometer (VSM) techniques.