Introduction of a novel nanosized N-sulfonated Brönsted acidic catalyst for the promotion of the synthesis of polyhydroquinoline derivatives via Hantzsch condensation under solvent-free conditions†,10.1039/C6RA04148E

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Lactoyl-CoA 全氟丁基戊烷白叶藤碱全氟己基辛烷新白叶藤碱壳寡糖特色专题-生物多肽

Introduction of a novel nanosized N-sulfonated Brönsted acidic catalyst for the promotion of the synthesis of polyhydroquinoline derivatives via Hantzsch condensation under solvent-free conditions†

Omid Goli-Jolodar,Farhad Shirini,Mohadeseh Seddighi

RSC Advances Pub Date : 03/11/2016 00:00:00 , DOI:10.1039/C6RA04148E

Abstract

In this research 4,4′-(butane-1,4-diyl)bis(1-sulfo-1,4-diazabicyclo[2.2.2]octane-1,4-diium)tetrachloride (NS-C₄(DABCO-SO₃H)₂)·4Cl) as a new nano sized N-sulfonic acid was prepared and characterized using different types of methods including FT-IR, ¹H NMR, ¹³C NMR, mass, XRD, TGA, SEM and AFM analysis. After the characterization of this reagent, it was efficiently used for the promotion of the one-pot synthesis of hexahydroquinolines via one-pot four-component condensation of aryl aldehydes, 1,3-cyclohexadione derivatives, β-ketoesters and ammonium acetate under solvent-free conditions. The procedure gave the products in excellent yields in short reaction times and good to high yields. Also this catalyst can be reused several times without loss of its catalytic activity.