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vol.64Nucleation, melting behaviour and mechanical properties of poly(L-lactic acid) affected by the addition of N, N'-bis(benzoyl) suberic acid dihydrazide[H2-cryptand 222]2+(Br3-)2 as a tribromide-type catalyst for the trimethylsilylation/tetrahydropyranylation of alcohols índice de autoresíndice de assuntospesquisa de artigos
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South African Journal of Chemistry

versão On-line ISSN 1996-840X
versão impressa ISSN 0379-4350


KHAZAEI, Ardeshir et al. Highly efficient method for solvent-free synthesis of diarylmethane and triarylmethane from benzylic alcohols using P2O5/Al2O3 or P2O5/SiO2 at room temperature. S.Afr.j.chem. (Online) [online]. 2011, vol.64, pp.120-126. ISSN 1996-840X.

A highly efficient procedure for the synthesis of triarylmethane and diarylmethane via benzylation of aromatic hydrocarbons from benzyl alcohols using supported P2O5 on SiO2 and/or Al2O3 under solvent-free conditions is described. Excellent yields of triarylmethane and diarylmethane were obtained using P2O5-SiO2 (50 % W/W) and/or P2O5-Al2O3 (50 % W/W) at room temperature. The reusability of both supported P2O5 on SiO2 and Al2O3 were examined. Both supported reagents show favorable activities in first and second runs, however, a decline in reactivity was observed in following attempts. The reaction is scalable to >0.03 mole amounts.

Palavras-chave : Diarylmethane; triarylmethane; aromatic alcohol; P2O5; silica gel; alumina.

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