Green Chemistry Preparation of thiochromeno[4,3-b]pyran and benzo[h]thiazolo[2,3-b]quinazoline Derivatives using HSBM Technique over ZnAl2O4 Nano-Powders
The aim of this paper is to introduce HSBM as a green and environmentallyfriendly technique for the synthesis of thiochromeno[4,3-b]pyran and benzo[h]thiazolo[2,3-b]quinazoline derivatives over ZnAl2O4 nanopowders as an efficient catalyst. MATERIALS AND METHODS ZnAl2O4 nanopowders were synthesized via a co-precipitation of Zn(NO3)2 and Al(NO3)3 salts and were characterized by XRD, FE-SEM, TEM and DLS
目的和目的本文的目的是介绍HSBM作为一种绿色环保技术,用于在ZnAl2O4纳米粉体上合成硫代色素[4,3-b]吡喃和苯并[h]噻唑并[2,3-b]喹唑啉衍生物作为有效的催化剂。材料与方法Zn(NO3)2和Al(NO3)3盐的共沉淀法合成了ZnAl2O4纳米粉,并通过XRD,FE-SEM,TEM和DLS技术对其进行了表征。所制备的ZnAl2O4纳米粉已被用作通过高速球磨(HSBM)技术合成吡喃核的催化剂。产物的结构通过NMR分析确认。结果ZnAl2O4呈现立方晶体结构(空间群:Fd-3m),平均晶粒尺寸为41 nm。通过DLS技术测定的ZnAl 2 O 4纳米粉末的平均粒径为55nm。研究了纳米粉体对2-氨基-4,5-二氢-4-芳基硫代色素[4,3-b]吡喃-3-腈,(8Z)-2-氨基-8-亚芳基的合成的催化活性。 -4,5,7,8-四氢-4-芳基硫代吡喃并[4,3-b]吡喃-3-腈,4-芳基-3
Green chemistry preparation of MgO nanopowders: efficient catalyst for the synthesis of thiochromeno[4,3-b]pyran and thiopyrano[4,3-b]pyran derivatives
ABSTRACT A mild and efficient method for the synthesis of thiochro meno[4,3-b]pyran and thiopyrano[4,3-b]pyran derivatives using MgO nanopowders as a catalyst is described. The MgO nanopowders were prepared via a green biosynthesis method using an extract of Rosmarinus officinalis leaves and were characterized by Field Emission Scanning Electron Microscopy and X-ray diffraction analyses. GRAPHICAL
An Efficient and Improved Method for the Synthesis of Bis(arylmethylidene)thiopyranones
作者:M. Saeed Abaee、Mohammad M. Mojtahedi、M. Mehdi Zahedi
DOI:10.1055/s-2005-872656
日期:——
aldehydes with tetrahydrothiopyran-4-one in the presence of N-(trimethylsilyl)diethylamine and 5 M lithium perchlorate in diethyl ether at room temperature is described. Excellent yields of 3,5-bis(arylmethylidene)thiopyranones are achieved in a facile one-pot general procedure.
描述了在室温下,在 N-(三甲基甲硅烷基)二乙胺和 5 M 高氯酸锂的二乙醚存在下,多种芳香醛与四氢噻喃-4-酮的双交叉羟醛缩合反应。3,5-双(芳基亚甲基)噻喃酮的高产率是通过简单的一锅通用程序实现的。
A highly efficient method for solvent-free synthesis of bisarylmethylidenes of pyranones and thiopyranones
作者:M. Saeed Abaee、Mohammad M. Mojtahedi、M. Mehdi Zahedi、Roholah Sharifi
Synthesis and antiinflammatory activity of hexahydrothiopyrano[4,3-c]pyrazoles and related analogs
作者:George C. Rovnyak、Robert C. Millonig、Joseph Schwartz、Virginia Shu
DOI:10.1021/jm00354a018
日期:1982.12
A series of novel hexahydrothiopyrano[4,3-c]pyrazoles and related analogues were prepared and tested for antiinflammatory activity by using the mouse active Arthus reaction and the delayed hypersensitivity skin reaction in guinea pigs as primary screens. The compounds of most interest, 18 and 28, were further tested in a model of adjuvant-induced arthritis; in this system, both compounds were active