Application of highly sulfonated single-walled carbon nanotubes: An efficient heterogeneous catalyst for the one-pot synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes under solvent-free conditions
Abstract Highly sulfonated single-walled carbon nanotube-catalyzed synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes in excellent yields and very short reaction times. Sulfonated single-walled carbon nanotubes are prepared using a chemical and simple process and it characterized by Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, Thermal gravimetric
Brønsted Acidic Ionic Liquid as an Efficient and Reusable Catalyst for Synthesis of 14-Aryl- or 14-Alkyl-14H-dibenzo[a,j]xanthenes under Solvent-Free Conditions
and efficient method has been developed for the preparation of 14-aryl- or 14-alkyl-14H-dibenzo[a,j]xanthenes from one-pot condensation of aldehydes with 2-naphthol using catalytic amount of Bronsted acidic ionic liquid ([TEBSA][HSO 4 ]) underthermalsolvent-freeconditions. Excellent yields, short reaction times, easy workup and reusability of the catalyst as well as solvent-freeconditions are advantages
Zinc oxide nanoparticles: A highly efficient and readily recyclable catalyst for the synthesis of xanthenes
作者:Javad Safaei-Ghomi、Mohammad Ali Ghasemzadeh
DOI:10.1016/j.cclet.2012.09.016
日期:2012.11
A novel and efficient route for the synthesis of 1,8-dioxooctahydroxanthenes and 14-aryl-14H-dibenzo[a,j]xanthenes is described through one-pot multi-component reaction of dimedone and 2-naphthol with various aryl aldehydes using ZnO nanoparticles undersolvent-freeconditions. This method provides a novel and improved pathway for the synthesis of xanthenes in the terms of excellent yields, short reaction
Carboxyl functionalized graphene quantum dots (CGQDs) were applied as an efficient acidic catalyst for the coupling reaction of 2-naphthole and benzaldehyde derivatives for the preparation of 14H-dibenzo xanthene derivatives.
Application of Nanosized Cu<sub>0.5</sub>Co<sub>0.5</sub>Fe<sub>2</sub>O<sub>4</sub>Spinel Ferrite as a Nanocatalyst in the Synthesis of 14-Aryl-14H-dibenzo[a,j]xanthene Derivatives under Solvent-free Conditions
obtained by the hydrothermal method had the single‐phase crystalline. The resultant spinel ferrites were employed in the synthesis of 14‐aryl‐14‐H‐dibenzo[a,j]xanthenederivatives. It was found that the nanocatalyst Cu0.5Co0.5Fe2O4 displays the best performance in the synthesis of 14‐aryl‐14H‐dibenzo[a,j]xanthenes. The catalyst was reused several times without significant loss of its activity for the
采用水热法合成了铜钴取代的尖晶石型铁素体Cu 1-x Co x Fe 2 O 4(0≤X≤1)。所得的尖晶石铁氧体通过不同的技术进行系统地表征,例如X射线衍射(XRD),扫描电子显微镜(SEM),能量色散X射线光谱(EDX)和傅里叶变换红外光谱(FT-IR)。结果表明,水热法制得的所有尖晶石铁素体均为单相晶体。所得的尖晶石铁氧体用于合成14-芳基-14-H-二苯并[a,j]氧杂蒽衍生物。发现纳米催化剂Cu 0.5 Co 0.5 Fe 2 O图4显示了在14-芳基-14H-二苯并[a,j]氧杂蒽的合成中的最佳性能。将该催化剂重复使用数次,而不会显着损失其用于制备所需产物的活性。此外,产品的高收率,无溶剂条件和催化剂的可重复使用性是本研究的其他有价值的优势。