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The highly efficient asymmetric reduction of title compounds (I), (III), and (V) using a phosphine-free chiral Ru-complex furnishing corresponding β-hydroxy sulfonamides and -sulfones (II), (IV), and (VI), resp., is described. [ABSTRACT FROM AUTHOR]

An asymmetric methodology for the construction of formyl, hydroxyl, and ester functionalized spirocyclohexaneoxindoles in good yields with moderate diastereoselectivity and excellent enantioselectivity is reported. [ABSTRACT FROM AUTHOR]

The article highlights the chemical equations involved in the asymmetric organocatalytic conjugate addition of dialkyl phosphites to n-unprotected isatylidene malononitriles.

An abstract of the article "Construction of Highly Substituted Pyrazole Derivatives with P-C Bond: Access to Racemic and Enantioselective Forms by Conjugate Addition of Diarylphosphane Oxides to α,β-Unsaturated Pyrazolones" by Zhi-Cong Geng, Jin-Xin Zhang, and colleagues is presented.

A diagram is presented which explains the aromatization reaction formed during the combination of alpha,beta-unsaturated pyrazolones and azlactones.

The Michael addition products can be further transformed into tryptamine derivatives, e. [ABSTRACT FROM AUTHOR]

Both enantiomers of 3-hydroxyindolinone adducts can be prepared by using the two epimers RCI and SCI of a cinchona alkaloid derived thiourea. [ABSTRACT FROM AUTHOR]