Tungstophosphoric acid nanoparticles supported on polyamic acid: A mild and recoverable heterogeneous catalyst for the selective synthesis of mono and bulky bis(1,8-dioxooctahydroxanthene)s under solvent-free conditions |
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| Authors: | Masoud Nasr-Esfahani Zahra Rafiee Hassan Kashi |
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| Institution: | 1. Department of Chemistry, Yasouj University, Yasouj, Iranmanas@mail.yu.ac.ir;3. Department of Chemistry, Yasouj University, Yasouj, Iran |
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| Abstract: | A series of 1,8-dioxooctahydroxanthene derivatives and some crowded bis(1,8-dioxooctahdroxanthene) were selectively synthesized using tungstophosphoric acid nanoparticles supported on polyamic acid (TPA/PAA) as a new catalyst in solvent-free conditions. The high purity products were isolated and catalyst was easily separated in simple work-up and was recycled several times without loss of reactivity under the described reaction conditions. The reaction is characterized by short reaction time, high efficiency and environmentally friendly reaction conditions. |
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| Keywords: | Tungstophosphoric acid bis(1 8-dioxooctahdroxanthene) polyamic acid supported catalyst heterogeneous catalyst |
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