Green synthesis and characterisation of novel [1,3,4]thiadiazolo/benzo[4,5]thiazolo[3,2-<i>a</i>]pyrimidines <i>via</i> multicomponent reaction using vanadium oxide loaded on fluorapatite as a robust and sustainable catalyst
作者:Nagaraju Kerru、Lalitha Gummidi、Surya Narayana Maddila、Sandeep V. H. S. Bhaskaruni、Suresh Maddila、Sreekantha B. Jonnalagadda
DOI:10.1039/d0ra02298e
日期:——
as catalysts. The 2.5% V2O5/FAp exhibited excellent activity for the synthesis of novel [1,3,4]thiadiazolo[3,2-a]pyrimidines and benzo[4,5]thiazolo[3,2-a]pyrimidines. The one-pot three-component fusion reaction between chosen substrates of 1,3,4-thiadiazole-amines or 2-amino-benzothiazole, aldehydes and active methylene compounds in ethanol solvent at room temperature gave an excellent yield of products
我们合成了氟磷灰石上不同钒负载量的材料 (V 2 O 5 /FAp),使用各种光谱技术(包括 TEM、BET、XRD、FT-IR、SEM 和 EDX)充分表征了其结构特性,并评估了其作为催化剂的能力。 2.5% V 2 O 5 /FAp 对新型[1,3,4]噻二唑并[3,2- a ]嘧啶和苯并[4,5]噻唑并[3,2- a ]嘧啶的合成表现出优异的活性。所选底物 1,3,4-噻二唑胺或 2-氨基苯并噻唑、醛和活性亚甲基化合物在乙醇溶剂中在室温下进行一锅三组分融合反应,得到了优异的产物收率 (90–97 %),反应迅速(25-30 分钟)。该方案的优点是合成快速、反应条件温和、溶剂绿色、后处理简单、环境友好、催化剂可重复使用、无需柱层析。