Abstract Reaction between substituted thiazolylamine or oxazolylamine, triethyl orthoformate and sodium azide in the presence of tributylmethylammonium chloride in DMSO furnishes 1-substituted 1H-1,2,3,4-tetrazole in high yield.
Green synthesis of the 1‐substituted 1H‐1, 2, 3, 4‐tetrazoles over bifunctional catalyst based on copper intercalated into Mg/Al hydrotalcite modified magnetite nanoparticles
作者:Mehri Salimi、Azadeh Zamanpour
DOI:10.1002/aoc.5682
日期:2020.8
An effective one‐pot, convenient process for the synthesis of 1‐ substituted 1H‐tetrazoles from triethyl orthoformate, amines, and sodium azide is described using copper (II) doped and immobilized on functionalized magnetic hydrotalcite (Fe3O4/HT‐NH2 CuII) as a novel recyclable catalyst. The application of this catalyst allows the synthesis of a variety of tetrazoles in good to excellent yields in
使用掺杂并固定在功能化磁性水滑石(Fe 3 O 4 / HT-NH )上的铜(II)描述了一种从原甲酸三乙酯,胺和叠氮化钠合成1-取代的1H-四唑的有效的一锅便捷方法2铜II)作为一种新型可回收催化剂。该催化剂的应用允许在水中以良好至优异的产率合成多种四唑。使用傅立叶变换红外(FT-IR)光谱,X射线衍射(XRD),扫描电子显微镜(SEM),能量色散X射线光谱(EDX),热重分析(TGA),振动样品对新型催化剂进行表征磁力分析(VSM)和电感耦合等离子体分析(ICP-OES)。这种新方法具有几个优点,例如操作简便,实用性强,对各种基材的适用性强,并且无需任何繁琐的后处理或纯化。Cu II(掺杂和固定化)在功能化磁性水滑石上的负载量为4.66 mmol g -1从ICP-OES分析获得。而且,优异的催化性能,热稳定性和催化剂的分离性使其成为出色的多相体系,并且是其他多相催化剂的有用替代品。同
2-Benzothiazolyl tetrazolium salt indicators
申请人:Bayer Corporation
公开号:EP0476457A2
公开(公告)日:1992-03-25
2-Benzothiazolyl tetrazolium salt compounds have been found to be characterized by a reflectance spectrum exhibiting an extended plateau above about 600-650 nm. Such compounds are useful as chromogenic indicators for reducing substances such as NADH. The reflectance plateau confers improved accuracy to analytical assays, particularly for the determination of analytes of medical diagnostic significance, in which a colorimetric response on a reagent carrier matrix is measured by reflectance.
Thiazolyl tetrazolium salts with increased solubility in aqueous solutions have alkylammonium alkoxy substituents, preferably trimethyl ammonium propoxy groups substituents, on phenyl rings attached to the tetrazolium ring. Thiazolyl tetrazolium salts with increased solubility in aqueous solutions have alkyl ammonium alkoxy substituents, preferably trimethyl ammonium propoxy groups substituents, on phenyl rings attached to the tetrazolium ring, e.g. the compounds of the general formula shown below. Formula (A-)
a
.