Rapid, efficient and solvent-free synthesis of (un)symmetrical xanthenes catalyzed by recyclable sulfated polyborate
作者:Manisha S. Patil、Amey V. Palav、Chetan K. Khatri、Ganesh U. Chaturbhuj
DOI:10.1016/j.tetlet.2017.06.027
日期:2017.7
straightforward approach to the synthesis of 1,8-dioxo-octahydroxanthenes, 14-phenyl-14H-dibenzo[a,j]xanthene and tetrahydrobenzoxanthene-11-ones under solvent-free conditions usingsulfated polyborate as a highly efficientcatalyst. The procedure offers several advantages including cleaner reaction profile, mild reaction condition, economic, recyclable and environmentally benign catalyst, high yields, simple
Xanthenones: calixarenes-catalyzed syntheses, anticancer activity and QSAR studies
作者:Daniel Leite da Silva、Bruna Silva Terra、Mateus Ribeiro Lage、Ana Lúcia Tasca Góis Ruiz、Cameron Capeletti da Silva、João Ernesto de Carvalho、José Walkimar de Mesquita Carneiro、Felipe Terra Martins、Sergio Antonio Fernades、Ângelo de Fátima
DOI:10.1039/c4ob02611j
日期:——
An efficient method is proposed for obtaining tetrahydrobenzo[a]xanthene-11-ones and tetrahydro-[1,3]-dioxolo[4,5-b]xanthen-9-ones. The method is based on the use of p-sulfonic acid calix[n]arenes as catalystsundersolvent-freeconditions. The antiproliferative activity of fifty-nine xanthenones against six human cancer cells was studied. The capacity of all compounds to inhibit cancer cell growth
New nano-Fe<sub>3</sub>O<sub>4</sub>-supported Lewis acidic ionic liquid as a highly effective and recyclable catalyst for the preparation of benzoxanthenes and pyrroles under solvent-free sonication
magnetic nanomaterial-immobilized Lewisacidic ionic liquid was successfully synthesized by the covalent embedding of 3-(3-(trimethoxysilyl)propyl)-1H-imidazol-3-ium chlorozincate (II) ionic liquid to the surface of Fe3O4 nanoparticles. The material was then characterized by FT-IR, SEM, TEM, TGA, ICP-OES, Raman, and EDS. Its performance as a new-generation Lewisacidic catalyst was also examined on the
将3-(3-(三甲氧基甲硅烷基)丙基)-1 H-咪唑-3-氯锌酸盐( II )离子液体共价嵌入Fe 3 O表面,成功合成了一种新型磁性纳米材料固定化Lewis酸性离子液体4纳米粒子。然后通过 FT-IR、SEM、TEM、TGA、ICP-OES、拉曼和 EDS 对材料进行表征。其作为新一代路易斯酸性催化剂的性能也在超声介导的苯并氧杂蒽和吡咯合成中进行了检验。完成后,通过外部磁铁简单地回收催化剂以进行多次重复使用,而不会显着降低催化性能。
One-pot Three-component Route for the Synthesis of Functionalized 4<i>H</i>-chromenes Catalyzed by ZrOCl<sub>2</sub>·8H<sub>2</sub>O in Water
作者:Azim Ziyaei Halimehjani、Nahid Keshavarzi
DOI:10.1002/jhet.3081
日期:2018.2
method for the synthesis of functionalized 4H‐chromenes via a one‐pot three‐component condensation reaction of a 2‐hydroxybenzaldehyde with an active methylene compound and a carbon‐based nucleophile in the presence of a catalytic amount of ZrOCl2·8H2O in water under thermal condition has been described. High yields, simple work‐up procedure, performing reactions in water and synthesis of complex molecules
A magnetic nanoparticle supported dual acidic ionic liquid: a “quasi-homogeneous” catalyst for the one-pot synthesis of benzoxanthenes
作者:Qiang Zhang、Hong Su、Jun Luo、Yunyang Wei
DOI:10.1039/c1gc16031a
日期:——
A novel magneticnanoparticle supported dual acidic ionic liquid catalyst was synthesized by anchoring 3-sulfobutyl-1-(3-propyltriethoxysilane) imidazolium hydrogen sulfate onto the surface of silica-coated Fe3O4 nanoparticles. Due to the combination of nano-support features and flexible imidazolium linkers, it acted as a “quasi-homogeneous” catalyst to effectively catalyze the one-pot synthesis of