An Improved Method for the Synthesis of Triarylmethanes Using Heterogenized 12-Tungestocobaltic Acid

Title:An Improved Method for the Synthesis of Triarylmethanes Using Heterogenized 12-Tungestocobaltic Acid

Volume: 11 Issue: 3

Author(s): Ezzat Rafiee and Fereshteh Jalilian

Affiliation:

Keywords: Alkylation, benzhydrol, nano silica, polyoxometalate, triarylmethane, 12-tungestocobaltic acid.

Abstract: Two heterogeneous catalysts based on 12-tungestocobaltic acid, including K₅CoW₁₂O₄₀ and H₅CoW₁₂O₄₀ supported on rice husk ash extracted nano silica (CoW/NSiO₂), were used in selective alkylation of arenes with benzhydrol (diphenylmethanol). CoW/NSiO₂ exhibited the highest activity. Thus, it was selected as the best choice for the synthesis of various triarylmethanes. This catalyst could be recycled by simple filtration and reused several times without any regeneration. Short reaction time, excellent yield and ease of catalyst recovery with consistent activity make this protocol efficient and environmentally benign.

Cite this article as:

Rafiee Ezzat and Jalilian Fereshteh, An Improved Method for the Synthesis of Triarylmethanes Using Heterogenized 12-Tungestocobaltic Acid, Letters in Organic Chemistry 2014; 11 (3) . https://dx.doi.org/10.2174/15701786113106660080