Hexamethylenetetramine-based ionic liquid/MIL-101(Cr) metal–organic framework composite: a novel and versatile tool for the preparation of pyrido[2,3-<i>d</i>:5,6-<i>d</i>′]dipyrimidines
作者:Boshra Mirhosseini-Eshkevari、Mohammad Ali Ghasemzadeh、Manzarbanoo Esnaashari、Saeed Taghvaei Ganjali
DOI:10.1039/d0ra09054a
日期:——
hexamethylenetetramine-based ionic liquid immobilized on the MIL-101(Cr) metal–organic framework was successfully synthesized as a novel, efficient, and recoverable catalyst for the synthesis of pyrido[2,3-d:5,6-d′]dipyrimidine derivatives via the reaction of barbituric acid derivatives, 6-aminouracil/6-amino-1,3-dimethyl uracil, and aromatic aldehydes under solvent-free conditions. Characterization of the catalyst
在本文中,成功合成了一种固定在MIL-101(Cr)金属有机骨架上的六亚甲基四胺基离子液体,作为一种新型、高效、可回收的催化剂,用于合成吡啶并[2,3- d :5, 6- d ']二嘧啶衍生物是由巴比妥酸衍生物、6-氨基尿嘧啶/6-氨基-1,3-二甲基尿嘧啶和芳香醛在无溶剂条件下反应得到。采用场发射扫描电子显微镜(FE-SEM)、能量色散X射线光谱(EDS)、X射线衍射(XRD)、热重分析(TGA)、傅里叶变换等多种方法对催化剂进行表征红外分光光度法 (FT-IR) 和 Brunauer-Emmett-Teller (BET)。该方案的主要特点是转化效率高、反应时间短、收率优异、产物分离容易、条件温和以及有机催化剂潜在的高可回收性。
Rapid and efficient synthesis of fused heterocyclic pyrimidines under ultrasonic irradiation
Some fused heterocyclic pyrimidines have been synthesized in high yields using ultrasound irradiation in a one-pot, three-component and efficient process by condensation reaction of barbituric acids, aldehydes and a series of enamines in water. Prominent among the advantages of this new method are operational simplicity, good yields in short reaction times and easy work-up procedures employed. (C) 2009 Elsevier B.V. All rights reserved.