ChemInform Abstract: Enantioselective Reformatsky Reaction with Ketones. Asymmetric Synthesis of β-(tert-Hydroxy) Esters.

ChemInform ◽  
2010 ◽  
Vol 24 (34) ◽  
pp. no-no
Author(s):  
K. SOAI ◽  
A. OSHIO ◽  
T. SAITO
2006 ◽  
Vol 78 (2) ◽  
pp. 287-291 ◽  
Author(s):  
Pier Giorgio Cozzi ◽  
Eleonora Rivalta

The Reformatsky reaction is the well-recognized carbon-carbon bond-forming reaction of α-halo esters with aldehydes or ketones in the presence of Zn metal to give β-hydroxy esters. Recently, it has been reported that Rh- and Ni-catalyzed Reformatsky reaction, in which R2Zn (R = Me, Et) acts as the Zn source, reacted smoothly with carbonyl compounds and imines. Taking advantage of N-methylephedrine as a cheap and recoverable chiral ligand, we have discovered the first homogeneous enantioselective Ni-catalyzed imino Reformatsky reaction. The process is a one-pot, three-component reaction, in which Me2Zn plays multiple roles as dehydrating agent, reductant, and coordinating metal. Broad scope, high enantiomeric excess, and a simple procedure are adding value to our findings.


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