4-(二甲基氨基)苯甲醛,环己烷-1,3-二酮和一些1,3- [N,C]-二亲核试剂(5-氨基-3-甲基-1-苯基吡唑,3, 5-二甲氧基苯胺和4-氨基-1,3-二甲基嘧啶-2,6-二酮)在沸腾的乙酸中进行分解,分离出N,N-二甲基苯胺,并形成带有γ-未取代的吡啶环的缩合杂环系统(吡唑并[3,4- b ]喹啉,a啶和嘧啶并[4,5- b ]喹啉)。
采用简单、廉价、清洁、环保的方法合成了固体催化剂2-钼-10-钨磷酸铯盐(Cs 2.3 H 0.7 PW 10 Mo 2 O 40 ),命名为Cs-3。通过FTIR光谱、XRD、EDX、ICP-AES、SEM-TEM和BET技术研究了合成催化剂的物理化学性质。前体2-钼-10-钨磷酸(H 3 PW 10 Mo 2 O 40)易溶于水和其他极性溶剂。此外,它们的铯盐 Cs x H 3− x PW 10 Mo 2Cs含量在x = 2.0-2.5范围内的不溶于水和其他极性溶剂。Cs +离子进行部分质子交换后,前驱体的表面积(5.483 m 2 g -1 )增加(111.732 m 2 g -1),并且所有x > 1的样品均能抵抗活性成分的浸出并且可以回收利用没有明显的活动损失。该催化剂用于在 70 °C 无溶剂条件下通过绿色路线合成尿嘧啶衍生物,在更短的反应时间内产生更高的产率。发现该催化剂在九
Preparation, characterization and application of nano-[Fe3O4@-SiO2@R-NHMe2][H2PO4] as a novel magnetically recoverable catalyst for the synthesis of pyrimido[4,5-b]quinolines
作者:Abdolkarim Zare、Nesa Lotfifar、Manije Dianat
DOI:10.1016/j.molstruc.2020.128030
日期:2020.7
Afterward, an important class of uracil-bearing heterocycles namely pyrimido[4,5-b]quinolines has been synthesized through the one-pot multi-component reaction of 6-amino-1,3-dimethyluracil with arylaldehydes and dimedone using nano-[FSRN][H2PO4] as a dual-functional catalyst under solvent-free conditions. High yields, short reaction times, magnetic recoverability of the catalyst, no need to column chromatography
Nano-[Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>/<i>N</i>-propyl-1-(thiophen-2-yl)ethanimine][ZnCl<sub>2</sub>] as a nano magnetite Schiff base complex and heterogeneous catalyst for the synthesis of pyrimido[4,5-<i>b</i>]quinolones
Nano-[Fe3O4@SiO2/N-propyl-1-(thiophen-2-yl)ethanimine][ZnCl2] as a nano magnetite Schiff base complex was designed and successfully tested for the synthesis of pyrimido[4,5-b]quinolones.