Convenient Synthesis of 14-Aryl-14-H-dibenzo[<i>a,j</i>]xanthenes Catalyzed by Acyclic Brønsted Acidic Ionic Liquid [H-NMP]<sup>+</sup>[HSO<sub>4</sub>]<sup>−</sup>under Microwave Irradiation
作者:Hossein Naeimi、Zahra Sadat Nazifi
DOI:10.1002/jccs.201300019
日期:2013.9
14‐aryl‐14‐H‐dibenzo[a,j]xanthenes through condensation of β‐naphthol with various aromatic aldehydes in the presence of the catalytic amount of [H—NMP]+[HSO4]− under microwaveirradiation was described. This method has the advantages such as; very easy reaction workup, absolute separation of catalyst from the reaction mixture and smooth recyclability of catalyst. In this reaction 14‐aryl‐14‐H‐dibenzo[a,j]xanthenes
Sulfonated diatomite as heterogeneous acidic nanoporous catalyst for synthesis of 14-aryl-14-H-dibenzo[a,j]xanthenes under green conditions
作者:Hossein Naeimi、Zahra Sadat Nazifi
DOI:10.1016/j.apcata.2014.03.012
日期:2014.5
Sulfonic acid functionalized diatomite afforded diatomite-SO3H as an efficient heterogeneous solid acid nanoporous. The resulting immobilized catalysts have been successfully used in the synthesis of 14-aryl-14-H-dibenzo[a,j]xanthenes under solvent free conditions. This procedure has a lot of advantages such as very easy reaction conditions, recyclable heterogeneous acidic catalyst, natural catalyst, absence of any tedious workup or purification and much milder method. The corresponding products have been obtained in excellent yields, high purity and short reaction times. (C) 2014 Elsevier B.V. All rights reserved.
Environmentally benign and one-pot synthesis of 14-aryl-14H-dibenzo[a,j]xanthenes catalyzed by acyclic Brønsted acidic ionic liquid [H-NMP][HSO4] under green conditions
作者:Hossein Naeimi、Zahra Sadat Nazifi
DOI:10.1016/j.crci.2013.08.003
日期:2014.1
14-aryl-14 H -dibenzo[ a,j ]-xanthenes was described. The condensation of 2-naphthol with various aromatic aldehydes in the presence of a catalytic amount of [H-NMP][HSO 4 ] as a Bronsted acidicionicliquid under solvent-free conditions at 110 °C was described. This method has the following advantages: the reaction workup is very easy, and the catalyst is smoothly recycled to catalyze the preparation of