Ferrocenyl-1, 2-diphosphines, the production thereof and...

C - Chemistry – Metallurgy – 07 – F

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C07F 17/02 (2006.01) C07F 9/547 (2006.01)

Patent

CA 2548928

The invention relates to compounds of formula (I) provided in the form of racemic compounds, mixtures of diastereomers or essentially pure diastereomers, wherein R1 represents a hydrogen atom or C1-C4-alkyl, and at least one secondary phosphine depicts an unsubstituted or substituted cyclic phosphine group, or phosphonium salts thereof having one or two monovalent anions or a divalent anion. The compounds of formula (I) can be obtained by means of a novel method and are valuable ligands for catalytically active metal complexes in asymmetrical synthesis.

L'invention concerne des composés de formule (I), se présentant sous forme de racémates, de mélanges de diastéréomères ou de diastéréomères sensiblement purs. (a) Formule (I) phosphine secondaire. Dans cette formule, R¿1? désigne un atome d'hydrogène ou alkyle C¿1?-C¿4?, et au moins une phosphine secondaire représente un groupe phosphinique cyclique non substitué ou substitué, ou leurs sels de phosphonium avec un ou deux anions monovalents ou un anion bivalent. Les composés de formule (I) peuvent être obtenus à l'aide d'un nouveau procédé et constituent des ligands précieux pour des complexes métalliques à effet catalytique dans le cadre de la synthèse asymétrique.

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