KF‐Alumina Catalyzed One‐Pot Synthesis of Pyrido[2,3‐d]Pyrimidine Derivatives
摘要:
A series of pyrido[2,3-d]pyrimidine derivatives was synthesized by the reaction of arylaldehyde, malononitrile. and 4-amino-2,6-dihydroxylpyrimidine in ethyl alcohol at 80degreesC catalyzed by KF-Al2O3. Compared with other synthetic methods, this new method has the advantage of easier workup, milder reaction conditions, and good yields.
Abstract Mn-ZIF-8@ZnTiO3 nanocomposite was synthesized by sol-gelmethod. The morphology and structure of the nanocrystalline Mn-ZIF-8@ZnTiO3 was characterized by SEM, TEM, BET, XRD. The results confirmed the formation of Mn-ZIF-8@ZnTiO3 nanocomposite with particle size about 40 nm. The nanocrystalline Mn-ZIF-8@ZnTiO3 was used for efficient promotion of the synthesis of pyrano [2,3-d]pyrimidinone and
One-pot synthesis of pyrido[2,3-<i>d</i>]pyrimidines via efficient three-component reaction in aqueous media
作者:Daqing Shi、Shunjun Ji、Lihui Niu、Jingwen Shi、Xiangshan Wang
DOI:10.1002/jhet.5570440517
日期:2007.9
A short and facile synthesis of pyrido[2,3-d]pyrimidinederivatives was accomplished in good yields via the three-component reaction of aldehydes, alkyl nitriles and aminopyrimidines in water in the presence of triethylbenzylammonium chloride (TEBAC). The structures of these compounds were characterized by elemental analysis, IR and 1H NMR spectra and further confirmed by single crystal X-ray diffraction
在三乙基苄基氯化铵(TEBAC)存在下,通过醛,烷基腈和氨基嘧啶的三组分反应,可以快速,简便地合成吡啶并[2,3- d ]嘧啶衍生物。这些化合物的结构通过元素分析,IR和1 H NMR光谱进行表征,并通过单晶X射线衍射分析进一步证实。
A Clean Procedure for Synthesis of Pyrido[d]Pyrimidine Derivatives Under Solvent-Free Conditions Catalyzed by ZrO2 Nanoparticles
作者:Shahrzad Abdolmohammadi、Saeed Balalaie
DOI:10.2174/138620712800194486
日期:2012.4.1
A simple one-pot method for the preparation of 7-amino-2,4-dioxo-5-aryl-1,2,3,4-tetrahydropyrido[2,3-
d]pyrimidine-6-carbonitriles 4 from aromatic aldehydes, malononitrile and 4(6)-aminouracil in the presence of ZrO2
nanoparticles (ZrO2 NPs) as an efficient heterogeneous catalyst is described. The procedure has the advantages of high
yields (86-97%), short reaction time (2h) and an environmentally friendly specificity....
An efficient protocol for the facile synthesis of a series of pyrido[2,3-d]pyrimidine derivatives has been developed applying Fe3O4–ZnO–NH2–PW12O40 nanocatalyst in water. This novel method has the benefits of operational simplicity, green aspects by avoiding toxic solvents and high to excellent yields of products. Fe3O4–ZnO–NH2–PW12O40 was synthesized and characterized by Fourier transform infrared
使用 Fe3O4–ZnO–NH2–PW12O40 纳米催化剂在水中轻松合成一系列吡啶并 [2,3-d] 嘧啶衍生物的有效方案已被开发。这种新方法具有操作简单、绿色环保、避免使用有毒溶剂以及产品收率高的优点。 –ZnO–NH2–PW12O40 被合成并通过傅里叶变换红外、X 射线衍射、振动样品磁强计、扫描电子显微镜、能量色散 X 射线光谱和透射电子显微镜分析表征。纳米催化剂很容易通过外部磁铁从反应混合物中分离和回收。
Shi, Daqing; Niu, Lihui; Zhuang, Qiya, Journal of Chemical Research, 2005, # 10, p. 648 - 650