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, By Abdolkarim Zare

Research

Title	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
Type	Article
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
Journal	APPLIED CATALYSIS A-GENERAL
DOI	10.1016/j.apcata.2011.04.012
Researchers	Alireza Hasaninejad (First researcher) , Mohsen Shekouhy (Second researcher) , Nooshin Golzar (Third researcher) , Abdolkarim Zare (Fourth researcher) , Mohammad Mahdi Doroodmand (Fifth researcher)

Abstract

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.