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Title
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Silica bonded n-propyl-4-aza-1-azoniabicyclo[2.2.2]octane chloride (SB-DABCO): A highly efficient, reusable and new heterogeneous catalyst for the synthesis of 4H-benzo[b]pyran derivatives
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Type
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Article
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Keywords
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Silica bonded n-propyl-4-aza-1-azoniabicyclo[2.2.2]octane chloride (SB-DABCO); 4H-Benzo[b]pyran; Silica supported catalyst; Alkylmalonate; 5,5-dimethylcyclohexane-1,3-dione
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Abstract
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The reaction of 3-chloropropyl silica with diazabicyclo[2.2.2]octane in dry acetone affords silica bonded n-propyl-4-aza-1-azoniabicyclo[2.2.2]octane chloride (SB-DABCO) as a new basic catalyst. The catalyst is used for the efficient synthesis of 4H-benzo[b]pyran derivatives via one-pot three-component reaction of cyclic ketones/1,3-diketones with aromatic aldehydes and alkylmalonates.
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Researchers
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Alireza Hasaninejad (First researcher) , Mohsen Shekouhy (Second researcher) , Nooshin Golzar (Third researcher) , Abdolkarim Zare (Fourth researcher) , Mohammad Mahdi Doroodmand (Fifth researcher)
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