Morpholine stabilized on nano silica sulfuric acid: a novel reusable catalyst for the synthesis of triazoloquinazoline and polyhydroquinoline derivatives
the prepared reagent was investigated in the promotion of the synthesis of triazoloquinazoline derivatives. This reagent was also efficiently able to catalyze the synthesis of a variety of polyhydroquinoline derivatives. In both of the studied reactions, the procedure lead to the products with excellent yields during very short reaction times. Also, the catalyst was reused several times without considerable
在本研究中,吗啉在纳米二氧化硅硫酸上的稳定作用产生了一种新型的固体酸性试剂,使用傅里叶变换红外光谱 (FT-IR)、X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、透射电子显微镜 (TEM)、热重技术和能量色散 X 射线 (EDX)。接着,研究了所制备试剂在促进三唑并喹唑啉衍生物合成中的催化能力。该试剂还能够有效地催化多种聚氢喹啉衍生物的合成。在所研究的两个反应中,该程序在非常短的反应时间内产生具有优异产率的产物。此外,催化剂多次重复使用,其效率没有明显损失。
Three-Component Uncatalyzed Eco-Friendly Reactions for One-Pot Synthesis of 4,7-Dihydro[1,2,4]triazolo[1,5-<i>a</i>]pyrimidine Derivatives
作者:Eman A. El Rady
DOI:10.1002/jhet.1771
日期:2014.5
A three‐component system of one‐pot synthesis of [1,2,4]triazolo[1,5‐a]pyrimidinederivatives using condensation of 1,3‐dicarbonyl compounds, aldehydes, and 5‐amino[1,2,4]triazole in ethanol without any catalyst was reported in high yields via simple, efficient, and environmentally friendly process. The method reported herein considered a green process; this method has significant advantages of simple
一种三组分系统,可通过1,3-二羰基化合物,醛和5-氨基[1,2,4]的缩合一锅合成[1,2,4]三唑并[1,5- a ]嘧啶衍生物据报道,通过简单,有效和环保的方法,乙醇中无]]三唑的收率很高。本文报道的方法被认为是绿色工艺。与传统报道的方法相比,该方法具有以下优点:后处理步骤简单,产率极佳,对环境的污染最小,反应时间短。
Thiamine hydrochloride (VB1): an efficient promoter for the one-pot synthesis of benzo[4,5]imidazo[1,2-a]pyrimidine and [1,2,4]triazolo[1,5-a]pyrimidine derivatives in water medium
作者:Junhua Liu、Min Lei、Lihong Hu
DOI:10.1039/c2gc16499j
日期:——
A straightforward and general method has been developed for the synthesis of benzo[4,5]imidazo[1,2-a]pyrimidine and [1,2,4]triazolo[1,5-a]pyrimidinederivatives by simply combining 2-aminobenzimidazole or 3-amino-1,2,4-triazole, aldehyde, and β-dicarbonyl compound in the presence of a catalytic amount of thiamine hydrochloride (VB1). The advantages of this method are the use of an inexpensive and readily
已经开发了一种简单而通用的方法来合成 苯并[4,5]咪唑并[1,2- a ]嘧啶和[1,2,4]三唑并[1,5- a ]嘧啶衍生物简单地组合即可2-氨基苯并咪唑 或者 3-氨基1,2,4-三唑, 醛以及β-二羰基化合物在催化量的 盐酸硫胺素(VB 1)。这种方法的优点是使用便宜且容易获得的催化剂,简便的后处理,提高的产量以及使用 水 作为 溶剂 被认为是相对环境友好的。