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ChemInform Abstract: Tropos Biphenol Derived Chiral Thiophosphoramide Catalyzed Highly Diastereo- and Enantioselective Michael Addition of Cyclic Ketones to Nitro Olefins.

✍ Scribed by Aidang Lu; Ronghua Wu; Youming Wang; Zhenghong Zhou; Guiping Wu; Jianxin Fang; Chuchi Tang

Publisher
John Wiley and Sons
Year
2011
Weight
52 KB
Volume
42
Category
Article
ISSN
0931-7597

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✦ Synopsis

Abstract

The new thiophosphoramide (I) is used as efficient bifunctional organocatalyst for the asymmetric Michael addition of cyclic ketones to nitro olefins.

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## Abstract The title bifunctional organocatalyst promotes the Michael addition of both alkyl and aryl nitro olefins to acetone and cyclopentanone; however, no reactions are observed with cyclohexanone.

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## Abstract The reaction tolerates a variety of substituents at the C3‐ and C5‐positions of the indoles and various N‐substituents in maleimides (II).