一种新颖,简便,快速,无溶剂的方案,使用可重复使用的纳米ZnAl 2 O 4进行一锅绿色合成chromeno [2,3- d ]嘧啶– NOSE方法和光物理研究†
摘要:
目前的方案导致了生态友好,高度稳定,可重复使用的纳米ZnAl 2 O 4的制备,并且首次将其用作荧光色铬[2,3]假四组分合成的优良催化剂。 - d ]嘧啶衍生物。这种新颖的方案涉及在室温下在催化量的纳米ZnAl 2 O 4的存在下研磨水杨醛,丙二腈和仲胺,这是一种非常简单,便捷,经济高效,无溶剂的方案,并且仅需两分钟即可完成。获得具有优异产量的产品。合成的chromeno [2,3- d由于其激发态分子内质子转移(ESIPT)机理的特征,]嘧啶衍生物显示出显着的吸收和发射特性,并具有较大的斯托克位移值。纳米ZnAl 2 O 4由于具有63 m 2 g -1的较大表面积而表现出比本体更好的催化活性,并且在不损失活性的情况下被循环使用了5次。
Novel Approaches for the Synthesis of a Library of Fluorescent Chromenopyrimidine Derivatives
作者:Afsaneh Zonouzi、Fatemeh Hosseinzadeh、Nastaran Karimi、Roghieh Mirzazadeh、Seik Weng Ng
DOI:10.1021/co300141j
日期:2013.5.13
A library of some new fluorescent chromenopyrimidine derivatives has been synthesized by new approaches. Water-promoted and one-pot reaction can produce new dialkylylamino)-5H-chromeno[2,3-d]pyrimidin-2-yl) phenols. These compounds can also be produced using domino reaction. Two parallel methods are compared. Novel N-alkyl-N-phenyl-5H-chromeno [2,3-d] -pyrimidin-4-amines and 4-alkoxy-5H-chromeno[2, 3-d]pyrimidines are synthesized by Lewis-acid catalyzed reactions. The fluorescence emission intensity of the four compounds from each of libraries after excitation in 290 nm is measured. Compound 2-(4,5-bis(N-methyl-N-phenylamino)-5H-chromeno[2,3-d]pyrimidin-2-yl)phenol was isolated as a byproduct. The details of an interesting exchangeable intramolecular H-bonding of two of the new compounds are reported by X-ray analysis data.