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

Kundig, Ernst Peter; Liu, Rong-Ming; Ripa, Alberto

doi:10.1002/hlca.19920750818

Scientific article

English

A New Asymmetric Synthesis of Tricarbonylchromium Complexes of ortho-Substituted Benzaldehydes

ContributorsKundig, Ernst Peter; Liu, Rong-Ming; Ripa, Alberto

Published inHelvetica chimica acta, vol. 75, no. 8, p. 2657-2660

Publication date1992

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.

Affiliation

Faculté des sciences / Section de chimie et biochimie / Département de chimie organique

Citation (ISO format)

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. doi: 10.1002/hlca.19920750818

Article (Published version)

Identifiers

PID : unige:6225
DOI : 10.1002/hlca.19920750818

ISSN of the journal0018-019X

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A New Asymmetric Synthesis of Tricarbonylchromium Complexes of ortho-Substituted Benzaldehydes

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