Synlett 2016; 27(12): 1810-1813
DOI: 10.1055/s-0035-1561441
letter
© Georg Thieme Verlag Stuttgart · New York

Novel Magnetically Separable Sulfated Boric Acid Functionalized Nanoparticles for Hantzsch Ester Synthesis

Kobra Azizi
Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-4838, Tehran, Iran   Email: heydar_a@modares.ac.ir
,
Jamshid Azarnia
Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-4838, Tehran, Iran   Email: heydar_a@modares.ac.ir
,
Meghdad Karimi
Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-4838, Tehran, Iran   Email: heydar_a@modares.ac.ir
,
Elahe Yazdani
Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-4838, Tehran, Iran   Email: heydar_a@modares.ac.ir
,
Akbar Heydari*
Department of Chemistry, Tarbiat Modares University, P.O. Box 14115-4838, Tehran, Iran   Email: heydar_a@modares.ac.ir
› Author Affiliations
Further Information

Publication History

Received: 24 February 2016

Accepted after revision: 18 March 2016

Publication Date:
26 April 2016 (eFirst)

This article is dedicated to the memory of Mansour Sattari.

Abstract

A novel, separable, solid-acid catalyst consisting of sulfated boric acid nanoparticles immobilized on a silica-coated magnetite support was prepared. This catalyst permits the preparation of dihydropyridine derivatives (Hantzsch esters) by condensation of an aldehyde with two equivalents of a β-keto ester in the presence of ammonium acetate. The catalyst can be recovered and recycled.

Supporting Information

 
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