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The article offers chemical equations from the article "Catalytic Asymmetric Homologation of α-Ketoesters with α-Diazoesters: Synthesis of Succinate Derivatives with Chiral Quaternary Centers" by W. Li and others in a 2013 issue of the journal "Angewandte Chemie International Edition 52."

A combination of nickel and iron salts with a chiral proline-derived N,N′-dioxide ligand is an efficient catalytic system for the asymmetric cross-dehydrogenative coupling of cyclic β-ketoesters with xanthene. [ABSTRACT FROM AUTHOR]

This complete OH-selective sequential ene/Prins cyclization towards 4-hydroxy-tetrahydropyrans is characterized by high enantioselectivity, broad substrate scope, facile procedure and mild reaction conditions. [ABSTRACT FROM AUTHOR]

The enantioselectivity of the alkylation products can be inverted by simply changing the substitution pattern at the aryl group of the chiral ligands. [ABSTRACT FROM AUTHOR]

The enantioselective alkynylation of isatins catalyzed by a bifunctional guanidine/CuI catalyst under mild reaction conditions is described. [ABSTRACT FROM AUTHOR]

Moreover, the simple α-keto ester (X) can also be converted to the corresponding product (XI). [ABSTRACT FROM AUTHOR]

An abstract of the article "Scandium-Catalyzed Asymmetric 1,6-Addition of 3-Substituted Oxindoles to Linear Dienyl Ketones" by Z. Wang and colleagues is presented.

The asymmetric nitroaldol reaction of nitroethane with aromatic, heteroaromatic, or α,β-unsaturated aldehydes gives the anti-β-nitroalcohols as main isomers. [ABSTRACT FROM AUTHOR]

An abstract of the article "Direct Asymmetric Vinylogous Michael Addition of 3-Alkylidene Oxindoles to Chalcones Catalyzed by a Chiral N,N'-Dioxide Ytterbium(III) Complex" by X. Xiao and colleagues is presented.

An abstract of the article "N,N'-Dioxide-Scandium(III)-Catalyzed Asymmetric Aza-Friedel-Crafts Reaction of Sesamol with Aldimines" by Sha Bai and colleagues is presented.

This new process proceeds under mild conditions, exhibits a broad substrate scope and functional-group tolerance, and features good air and moisture tolerance. [ABSTRACT FROM AUTHOR]

The scalable title reaction affords the products with high diastereo- and enantioselectivities under mild conditions. [ABSTRACT FROM AUTHOR]

The scalable method is applicable to a broad range of arylated oxindoles and diaryliodonium salts with high to excellent enantioselectivity. [ABSTRACT FROM AUTHOR]

The article presents chemical structures of indole derivatives representing highly stereoselective conjugate addition and α-Alkynylatin reaction with electron-deficient alkynes catalyzed by chiral scandium(III) complexes.