Easily recyclable polymeric V(V) salen complex for the enantioselective O-acetyl cyanation of aldehydes

N H, Khan and Santosh , Agrawal and R I, Kureshy and S.H.R., Abdi and Vishal J, Mayani and R V , Jasra (2007) Easily recyclable polymeric V(V) salen complex for the enantioselective O-acetyl cyanation of aldehydes. Journal of Molecular Catalysis A: Chemical , 264 (1-2). pp. 140-145.

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Official URL: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TGM-4KWJY20-1&_user=518931&_coverDate=03%2F01%2F2007&_alid=589647082&_rdoc=2&_fmt=full&_orig=search&_cdi=5258&_sort=d&_docanchor=&view=c&_ct=28&_acct=C000025838&_version=1&_urlVersion=0&_userid=51

Abstract

A new recyclable polymeric V(V) salen complex 1 derived from poly[(R,R)-N,N′-bis-{3-(1,1-dimethylethyl)-5-methylene salicylidene} cyclohexane 1,2-diamine] with vanadyl sulphate was synthesized and characterized by microanalysis, 1H NMR, optical rotation, IR, and UV–vis spectroscopy. The complex 1 was used as catalyst for asymmetric O-acetyl cyanation of various aldehydes with KCN as an inexpensive and non-volatile cyanide source and acetic anhydride at −20 °C. High chiral induction (ee, 96%) for O-acetylcyanohydrin was obtained in the case of 2-methylbenzaldehyde with added advantage of catalyst recyclability.

Item Type:	Article
Subjects:	Science > Chemistry
ID Code:	926
Deposited By:	Prof Balasubramanian Viswanathan
Deposited On:	16 Jun 2007 15:22
Last Modified:	16 Jun 2007 15:22

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