NANO TIO2@KSF AS A HIGH-EFFICIENT CATALYST FOR SOLVENT-FREE SYNTHESIS OF BISCOUMARIN DERIVATIVES

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MOHAMMADI ZEYDI MASOUD; MAHMOODI NOSRATOLLAH

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Journal Paper

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Journal: International Journal of Nano Dimension Year:2016 | Volume:7 | Issue:2 Page(s): 174-180

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Title

NANO TIO2@KSF AS A HIGH-EFFICIENT CATALYST FOR SOLVENT-FREE SYNTHESIS OF BISCOUMARIN DERIVATIVES

Author(s)

MOHAMMADI ZEYDI MASOUD | MAHMOODI NOSRATOLLAH | Issue Writer Certificate

Keywords

AROMATIC ALDEHYDES

BISCOUMARINS

NANO TIO2@KSF

SOLVENT-FREE CONDITIONS

4-HYDROXYCOUMARIN

Abstract

An efficient, simple and convenient route is described for the synthesis of bis coumarin (3, 3' - (arylmethylene) bis (4-hydroxy-2 H -chromen-2-one)) by using recyclable catalyst TiO2@KSF. In this procedure, we synthesize abis coumarin derivative via the three multi-component reactions (3MCRs) of two equivalent 4-HYDROXYCOUMARIN with one equivalent of various AROMATIC ALDEHYDES in the presence of 20 mg nano TiO2@KSF as homogeneous catalyst under SOLVENT-FREE CONDITIONS at 100oC for the convinced reaction times (8–5 min). e advantages of this protocol towards the synthesis of bis coumarin derivatives are: a) use of SOLVENT-FREE CONDITIONS, b) inexpensive catalyst, c) using commercially available precursors, d) reusability of TiO2@KSF up to four cycles without much loss in reactivity, e) simple work-up, f) high yields of pure products, g) short reaction times. The structure of all biscoumarin derivatives were confirmed by M.p., TLC, FT-IR, 1H NMR spectra and were compared with reliable references.

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