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Stereoselective Aldol Addition to Rhenium(I) Complexes and Reversible Dimerization with Epimerization of the Metal Center

AuthorsÁlvarez, Celedonio M.; Carrillo Fumero, Romen ; García‐Rodríguez, Raúl; Miguel, Daniel
KeywordsMetal Complexes
Aldol Reaction
Chiroptical Compounds
Issue Date17-Jun-2013
CitationChemistry - A European Journal 19(25): 8285-8293 (2013)
AbstractHerein, we report several examples of stereoselective aldol additions of aldehydes or ketones to ReI tricarbonyl complexes to form monomeric derivatives in good yields. The metal‐centered chirality defines the final stereochemistry of the carbon atom of the monomeric ReI complex after the addition. However, it cannot control the resulting stereochemistry of the enolate part, and thus, if the α‐carbon atom of the reagent is prochiral, a mixture of diastereoisomers is obtained. On the other hand, all of the monomeric complexes can be reversibly dimerized in basic media to form cis dimers, for which an epimerization of the metal‐centered chirality is required in order to avoid steric congestion. All of these results are supported by exhaustive crystallographic analysis.
Publisher version (URL)https://doi.org/10.1002/chem.201300412
Identifiersdoi: 10.1002/chem.201300412
issn: 0947-6539
e-issn: 1521-3765
Appears in Collections:(IPNA) Artículos
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