## Abstract No base is required for the Mg(II)‐catalyzed conjugate addition of nitromethane to α′‐hydroxy enones in the presence of molecular sieves. Good enantioselectivities are attained using 3 or 4 Å MS and about 10 mol % of Mg(OTf)~2~‐chiral bisoxazoline complexes. Elaboration of the adducts t
Catalytic Enantioselective Conjugate Addition of Nitromethane to α′-Hydroxy Enones as Surrogates of α,β-Unsaturated Carboxylic Acids and Aldehydes.
✍ Scribed by Claudio Palomo; Raquel Pazos; Mikel Oiarbide; Jesus M. Garcia
- Publisher
- John Wiley and Sons
- Year
- 2006
- Weight
- 31 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0931-7597
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📜 SIMILAR VOLUMES
## Abstract The first example of an organocatalytic asymmetric Michael addition of aldehydes to α,β‐unsaturated thiol esters promoted by chiral diphenylprolinol silyl ether is presented. The reaction occurs with good yields, diastereoselectivity and excellent enantioselectivity.
Organocatalysis [1] has expanded widely within the last few years, since the rediscovery of the proline-catalyzed aldol reaction. [2] Since then, several different methods, such as fluorination, [3] chlorination, [4] bromination, [5] sulfenylation, [6] amination, [7] and Mannich reactions, [8] have