Stereoselective Aldol Addition to Re(I) Complexes and Reversible Dimerization with Epimerization of the Metal Center 
Celedonio M. Álvarez, Romen Carrillo, Raúl García-Rodríguez, Daniel Miguel 
Chem. Eur. J., 2013, 19, 8285-8293. DOI: 10.1002/chem.201300412

 

Facing up to Re: The stereochemical pathways of the stereoselective aldol addition of carbonyl compounds to ReI complexes and pH-driven dimerizations of these adducts (see scheme; Tf=trifluoromethanesulfonyl) have been studied by crystallographic analysis. The aldol addition only occurs on one face of the carbonyl compound, whereas the dimerization occurs with a concomitant epimerization of the metal center.

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pH-driven dynamic stereoinduction: epimerization upon dimerization in rhenium(I) complexes.
Celedonio M. Álvarez, Romen Carrillo, Raúl García-Rodríguez and Daniel Miguel
Chem Commun., 2011, 47, 12765-12767. DOI: 10.1039/C1CC14799D.

 

Basic conditions lead to dimerization of a Re(I) complex and concomitantly to an epimerization of the metal centre. The process is reversible upon acid addition.

This communnication was given the inside cover of Chem Comm. 2011, 47, issue 48