Ruthenium-Catalyzed Addition of Aromatic Amides to Internal Alkynes and Subsequent Intramolecular Cyclization for the Atom-Economical Synthesis of Isoindolinones

Ruthenium-Catalyzed Addition of Aromatic Amides to Internal Alkynes and Subsequent Intramolecular Cyclization for the Atom-Economical Synthesis of Isoindolinones

A selective and atom-economical synthesis of isoindolinones is described. This novel synthetic strategy involves two catalytic reactions: the ruthenium-catalyzed regioselective alkenylation of aromatic C–H bond of aromatic amides with internal alkynes, and subsequent intramolecular cyclization of th...

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Veröffentlicht in:Journal of organic chemistry 2017-01, Vol.82 (2), p.1231-1239
Hauptverfasser: Miura, Hiroki, Terajima, Sachie, Tsutsui, Kentaro, Shishido, Tetsuya
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container_title Journal of organic chemistry
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creator Miura, Hiroki
Terajima, Sachie
Tsutsui, Kentaro
Shishido, Tetsuya
description A selective and atom-economical synthesis of isoindolinones is described. This novel synthetic strategy involves two catalytic reactions: the ruthenium-catalyzed regioselective alkenylation of aromatic C–H bond of aromatic amides with internal alkynes, and subsequent intramolecular cyclization of the resulting alkene with amide functionalities. The addition of only a catalytic amount of bases is required for efficient construction of the desired isoindolinones, and no byproducts are formed in the tandem catalytic reactions. Various kinds of aromatic amides and internal alkynes can be used in the present reactions, and the corresponding isoindolinones bearing a quaternary carbon at the C3 position are obtained in good to high yields.
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title Ruthenium-Catalyzed Addition of Aromatic Amides to Internal Alkynes and Subsequent Intramolecular Cyclization for the Atom-Economical Synthesis of Isoindolinones
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