在这项工作中,已经开发了一种简便,高效且不含金属的催化体系,用于通过各种醛,2-萘酚和二甲基酮的一锅三组分缩合反应合成四氢苯并[ a ] x吨衍生物。首次,桔皮作为具有高孔隙率和高效率的绿色,酸性和低成本的天然催化剂在四氢苯并[使用一个]氧杂蒽的合成过程。这种环境友好的新型催化体系可在无溶剂条件下于120°C的条件下以高至极好的收率获得所需的产品。
Nanocrystalline TiO2–HClO4 catalyzed three-component preparation of derivatives of 1-amidoalkyl-2-naphthol, 1-carbamato-alkyl-2-naphthol, 1-(α-aminoalkyl)-2-naphthol, and 12-aryl-8,9,10,12-tetrahydrobenzo[a]-xanthen-11-one
作者:Hamid Reza Shaterian、Majid Mohammadnia
DOI:10.1007/s11164-012-0938-6
日期:2013.11
1-Amidoalkyl-2-naphthols, 1-carbamatoalkyl-2-naphthols, and 1-(α-aminoalkyl)-2-naphthols have been prepared by three-component reaction of 2-naphthol, aromatic aldehydes, and NH compounds, i.e. amides, carbamates, and secondary amines, respectively, in the presence of a catalytic amount of nanocrystalline TiO2–HClO4. In addition, 12-aryl-8,9,10,12-tetrahydrobenzo[a]-xanthen-11-one derivatives have been synthesized by reaction of 2-naphthol, aromatic aldehydes, and dimedone in the presence of the same nano catalyst. These reactions were studied under solvent-free conditions. This white acidic heterogeneous catalyst is very stable under the reaction conditions and was reused several times without significant loss of activity.
HAp‐encapsulated γ‐Fe
<sub>2</sub>
O
<sub>3</sub>
‐supported dual acidic heterogeneous catalyst for highly efficient one‐pot synthesis of benzoxanthenones and 3‐pyranylindoles
A novel method is reported for the synthesis of benzoxanthenone and 3‐pyranylindole derivatives via one‐pot three‐component reactions using a newly synthesized HAp‐encapsulated γ‐Fe2O3‐supported dual acidic heterogeneous catalyst, as a reusable and highly efficient nanocatalyst. In this protocol the use of the nanocatalyst provided a green, useful and rapid method to generate products in short reaction
Preparation, characterization and application of ionic liquid sulfonic acid functionalized pyridinium chloride as an efficient catalyst for the solvent-free synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]-xanthen-11-ones
作者:Ahmad Reza Moosavi-Zare、Mohammad Ali Zolfigol、Mahmoud Zarei、Abdolkarim Zare、Vahid Khakyzadeh
DOI:10.1016/j.molliq.2013.05.009
日期:2013.10
In this work, novel ionic liquid namely sulfonicacidfunctionalized pyridinium chloride [Pyridine–SO3H]Cl} is synthesized, and characterized by studying its IR, UV, 1H and 13C NMR as well as mass spectra. This ionic liquid is used as an efficient, homogeneous and reusable catalyst for the solvent-free synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]-xanthen-11-ones by the one-pot multi-component
在这项工作中,合成了新型离子液体,即磺酸官能化的吡啶鎓氯化物[吡啶-SO 3 H] Cl},并通过研究其IR,UV,1 H和13 C NMR以及质谱进行了表征。这种离子液体可作为一种有效,均质且可重复使用的催化剂,用于通过一锅多组分无溶剂合成12-芳基-8,9,10,12-四氢苯并[ a ]-黄原-11-酮2-萘酚与芳醛和二甲酮(5,5-二甲基环己烷-1,3-二酮)的缩合反应。
Niobium Pentachloride Catalyzed One-Pot Multicomponent Condensation Reaction of &#946;-Naphthol, Aryl Aldehydes and Cyclic 1, 3-Dicarbonyl Compounds
Niobium pentachloride catalyzed one-pot multicomponent condensation reaction of β-naphthol, aryl aldehydes
and cyclic 1,3-dicarbonyl compounds. Thus, a variety of 8,9,10,12-tetrahydrobenzo[a] xanthen-11-one derivatives were
produced in good to excellent yields.