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Title: Selective synthesis of 6,8-di-t-butylated flavan over Zn-Al containing mesoporous silica catalysts
Authors: Selvaraj, M.
Sinha, P.K.
Park, D.-W.
Kim, I.
Kawi, S. 
Ha, C.S.
Issue Date: 14-Dec-2012
Citation: Selvaraj, M., Sinha, P.K., Park, D.-W., Kim, I., Kawi, S., Ha, C.S. (2012-12-14). Selective synthesis of 6,8-di-t-butylated flavan over Zn-Al containing mesoporous silica catalysts. Dalton Transactions 41 (46) : 14197-14203. ScholarBank@NUS Repository.
Abstract: We demonstrate a much green synthesis method for highly selective synthesis of 6,8-di-t-butylated flavan (6,8-DTBF) by liquid phase alkylation of 2,4-di-t-butylphenol (2,4-DTBP) with cinnamyl alcohol (Cin-OH) over mesoporous Zn-Al-MCM-41 catalysts synthesized under direct basic hydrothermal method. The main alkylated product, 6,8-DTBF is importantly used as an intermediate in the manufacture of biosynthetic organic compounds. The recyclable mesoporous Zn-Al-MCM-41 catalysts have also been reused in this reaction to study their catalytic activities. The influences of various reaction parameters such as temperature, time, ratios of reactant (2,4-DTBP-to-Cin-OH) have been extensively investigated for the synthesis of 6,8-DTBF. In addition, dimethyl sulfoxide (DMSO) has also been used as a solvent in this catalytic reaction. The mesoporous Zn-Al-MCM-41(75) gives excellent catalytic activity with 6,8-DTBF selectivity (86.0%) and 2,4-DTBP conversion (63.1%), and these catalytic results have also compared with that obtained using other mesoporous and microporous catalysts. On the basis of catalytic activity obtained by using the all catalysts, the Zn-Al-MCM-41(75) catalyst is found to be a highly active, recyclable and eco-friendly heterogeneous catalyst in the liquid-phase alkylation of 2,4-DTBP. This journal is © The Royal Society of Chemistry 2012.
Source Title: Dalton Transactions
ISSN: 14779226
DOI: 10.1039/c2dt31409f
Appears in Collections:Staff Publications

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