A green and convenient protocol for the synthesis of diarylmethanes via a one-pot, three-component reaction catalyzed by a novel silica tungstic acid (STA) under solvent-free conditions - 27/03/15
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Abstract |
A cost-effective and eco-friendly synthesis of diarylmethanes derivatives has been developed through the Mannich type Friedel–Crafts addition reaction of tertiary aromatic amine formaldehydes with β-naphthol/indole using silica-supported tungstic acid (STA) as a recyclable heterogeneous acid catalyst in solvent-free condition. Here, we proposed two schemes using the same catalyst. The effects of different solvents have been studied and a comparison of silica-supported tungstic acid with different acid catalysts has also been made.
Il testo completo di questo articolo è disponibile in PDF.Keywords : Silica-supported tungstic acid (STA), Diarylmethanes derivatives, Friedel–Crafts reaction, Solvent-free condition, Multicomponent reaction
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Vol 18 - N° 4
P. 449-455 - aprile 2015 Ritorno al numero
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