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

Hasaninejad A; Shekouhy M; Golzar N; Zare A; Doroodmand MM

Applied Catalysis A: General, Vol.402, No.1-2, 11-22, 2011

DOI10.1016/j.apcata.2011.04.012 Export Citation

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

Hasaninejad A, Shekouhy M, Golzar N, Zare A, Doroodmand MM

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. (C) 2011 Elsevier B.V. All rights reserved.

Keywords: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