Abstract An eco friendly and efficient method for the synthesis of 1,8-dioxooctahydroxanthene derivatives in excellent yield (∼90%) using ionicliquids 1-butyl-3-methylimidazoliumtetrafluoroborate (BMIF), 1-butyl-3-methylimidazoliumbromide (BMIB) and 1-butyl-3-methylimidazoliumchloride (BMIC) under solvent free condition has been developed for the first time. All the synthesized compounds (3a-3k) were
Tungsten oxides: green and sustainable heterogeneous nanocatalysts for the synthesis of bioactive heterocyclic compounds
作者:T. A. J. Siddiqui、Shoyebmohamad F. Shaikh、Balaji B. Totawar、Madhuri Dumpala、Mohd Ubaidullah、Badr M. Thamer、Rajaram S. Mane、Abdullah M. Al-Enizi
DOI:10.1039/d0dt04238b
日期:——
Tungsten oxide (WO3) as an efficient heterogeneous catalyst was prepared via a simple hydrothermal route for the synthesis of a wide range of bioactive heterocycliccompounds. The present investigation deals with the rapid and low-cost synthesis of C-3-alkylated 4-hydroxycoumarin, chromene, and xanthene derivatives. WO3 nanorods (NRs) are successfully envisaged to catalyze desired transformations,
氧化钨 (WO 3 ) 作为一种高效的多相催化剂是通过简单的水热途径制备的,用于合成范围广泛的生物活性杂环化合物。本研究涉及C -3-烷基化 4-羟基香豆素、色烯和呫吨衍生物的快速和低成本合成。WO 3纳米棒(NRs)被成功设想为催化所需的转化,展示了它们在催化中的广泛潜在应用。阐明了合成转化细节、最小催化量、优异的产品产率和形成这些杂环支架的合理反应机制。制备的WO 3NRs 的特征是分别通过 X 射线衍射、X 射线光电子能谱和场发射扫描电子显微镜测量来确认它们的结构、化学和形态参数。我们讨论了控制产物形成的因素,以及 WO 3 NRs的积极作用,这对于当前热条件研究中的底物活化至关重要。在此,报告了所制备化合物的详细合成和光谱信息。