Use of PS-Zn-anthra complex as an efficient heterogeneous recyclable catalyst for carbon dioxide fixation reaction at atmospheric pressure and synthesis of dicoumarols under greener pathway

Publication date: Available online 3 April 2018 Source:Journal of Organometallic Chemistry Author(s): Swarbhanu Ghosh, Paramita Mondal, Debasis Das, Kazi Tuhina, Sk. Manirul Islam A polystyrene functionalized Zinc anthranilic acid complex catalyst has been prepared. The PS-Zn-anthra complex has been characterized by EDX, Scanning electron micrographs (FE-SEM), FTIR spectra, UV–vis spectra and thermogravimetric analyses. A greener and novel methodology was considered for the production of dicoumarol derivatives utilizing PS-Zn-anthra complex as a Lewis acid catalyst, non-toxic, mild in H2O employing heteroaromatic/aromatic aldehydes and 4-hydroxycoumarin. The catalyst also shows good catalytic activity in the cyclo addition of CO2 to epoxide. The results of activity of catalyst imply that the procedure adopted provides numerous advantages such as low loading of catalyst, operational simplicity, mild reaction conditions, quantitative yields, and short reaction time. The PS-Zn-anthra complex exhibited the elevated efficiency of recycling in these reactions. This catalyst can be recycled for five times without appreciable loss of its activity. Graphical abstract
Source: Journal of Organometallic Chemistry - Category: Chemistry Source Type: research