Vanadyl salen complexes covalently anchored to an imidazolium ion as catalysts for the cyanosilylation of aldehydes in ionic liquids
作者： Carlos Baleizão , Bárbara Gigante , Hermenegildo Garcia , Avelino Corma
DOI: 10.1016/S0040-4039(03)01746-5
关键词: Radical initiator 、 Chloride 、 Catalysis 、 Ionic liquid 、 Enantioselective synthesis 、 Chemistry 、 Metal salen complexes 、 Covalent bond 、 Organic chemistry 、 Enantiomer 、 Polymer chemistry 、 Biochemistry 、 Drug discovery
摘要: Two vanadyl salen complexes having peripheral styryl substituents have been reacted with 1-methyl-3-(3-mercaptopropyl)-imidazolium chloride using azoisobutyronitrile as radical initiator. The resulting compounds contain at the same time a complex and one imidazolium cation. In agreement expectations in view of their structure, these were insoluble conventional organic solvents, but completely miscible ionic liquids. These bonded to an cation are highly active reusable catalysts for cyanosilylation aldehydes. Moderate enantiomeric excesses obtained chiral version this complex.
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