Catalysis Database

Chiral lanthanum–lithium–binaphthol complex covalently bonded to silica and MCM-41 for enantioselective nitroaldol (Henry) reaction

A P , Bhatt and Kavita , Pathak and R V , Jasra and R I, Kureshy and N H, Khan and S.H.R., Abdi (2006) Chiral lanthanum–lithium–binaphthol complex covalently bonded to silica and MCM-41 for enantioselective nitroaldol (Henry) reaction. Journal of Molecular Catalysis A: Chemical , 244 (1-2). pp. 110-117.

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Official URL: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TGM-4H98NTF-4&_user=518931&_coverDate=02%2F01%2F2006&_alid=589647082&_rdoc=10&_fmt=full&_orig=search&_cdi=5258&_sort=d&_docanchor=&view=c&_ct=28&_acct=C000025838&_version=1&_urlVersion=0&_userid=5

Abstract

A chiral BINOL ligand covalently anchored on silica and mesoporous MCM-41 was synthesized and characterized by powder XRD, FT-IR, N2 adsorption–desorption measurements, TGA and elemental analysis. These anchored ligands were then used to prepare La–Li–BINOL–silica 1a and La–Li–BINOL–MCM-41 1b complexes. The immobilized catalysts having lanthanum content around 0.12–0.18 mmol/g were tested as enantioselective catalyst for Henry reaction and ee 55–84% were found which were comparable to its homogeneous counterpart. The solid catalysts can be reused by simple filtration and recycled several times without much loss in performance.

Item Type:Article
Subjects:Science > Chemistry
ID Code:918
Deposited By:Prof Balasubramanian Viswanathan
Deposited On:16 Jun 2007 14:40
Last Modified:16 Jun 2007 14:40

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