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A New Asymmetric Synthesis of Tricarbonylchromium Complexes of <i>ortho</i>-Substituted Benzaldehydes

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Ripa, Alberto
Published in Helvetica Chimica Acta. 1992, vol. 75, no. 8, p. 2657-2660
Abstract ortho-Substituted [Cr(CO)3(benzaldehyde)] complexes are obtained via nucleophilic addition of alkyl- and aryllithium reagents to a [Cr(CO)3(phenylmethaneimine)] complex followed by endo-hydride abstraction with triphenylmethyl cation. This sequence, when carried out with a [Cr(CO)3(benzaldehyde SAMP hydrazone)] complex affords substituted derivatives (Me, Bu, Ph, vinyl) with high (=/>97%) diastereoselectivity and, after hydrolysis, ortho- substituted [Cr(CO)3(benzaldehyde)] ((S)-1) complexes of high enantiomeric purity.
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KUNDIG, Ernst Peter, LIU, Rong-Ming, RIPA, Alberto. A New Asymmetric Synthesis of Tricarbonylchromium Complexes of <i>ortho</i>-Substituted Benzaldehydes. In: Helvetica Chimica Acta, 1992, vol. 75, n° 8, p. 2657-2660. https://archive-ouverte.unige.ch/unige:6225

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Deposited on : 2010-04-20

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