Highly Selective Aldol Condensation Using Amine-functionalized SiO2-Al2O3 Mixed-oxide under Solvent-free Condition |
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| Authors: | Dr Alireza Abbaspourrad Dr Roozbeh Javad Kalbasi Qin Xiao |
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| Institution: | 1. Department of Chemistry, Islamic Azad University, Shahryar‐Qods City Branch, 37515‐374, Qods City, Tehran, Iran;2. Department of Chemistry, Islamic Azad University, Shahreza Branch, 311‐86145, Shahreza, Isfahan, Iran |
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| Abstract: | A series of amine catalysts supported on mesoporous molecular sieves SiO2/Al2O3 with trimethoxysilylpropylamine (CH3O)3Si(CH2)3NH2] loading varying from 3 mmol to 6 mmol were synthesized by impregnation method. The aldol condensation of various aromatic aldehydes and 1‐heptanal was used to test the acid‐base cooperativity of amine‐functionalized SiO2/Al2O3. The effects of solvent, reaction temperature, benzaldehyde to 1‐heptanal molar ratio, different supports (SiO2, Al2O3 and SiO2‐Al2O3), catalyst amount and recyclability of the catalyst were investigated. Sample containing 5 mmol amine loaded showed highest benzaldehyde conversion (100%) and selectivity (97%) for jasminaldehyde. |
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| Keywords: | aldol reaction jasminaldehyde 1‐heptanal organic‐inorganic hybrid composites solvent‐free |
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