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Ugi post-condensation copper-triggered oxidative cascade towards pyrazoles.

ABSTRACT: Pyrazolidinones were prepared in a two-step sequence starting from ?-hydrazonocarboxylic acids. After a four-component Ugi coupling, the resulting hydrazone was engaged in a copper triggered [3 + 2] cycloaddition/aerobic oxidation cascade.

SUBMITTER: Santos AD 

PROVIDER: S-EPMC3201043 | biostudies-literature | 2011

REPOSITORIES: biostudies-literature

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Ugi post-condensation copper-triggered oxidative cascade towards pyrazoles.

Santos Aurélie Dos AD   El Kaim Laurent L   Grimaud Laurence L   Ronsseray Caroline C  

Beilstein journal of organic chemistry 20110921

Pyrazolidinones were prepared in a two-step sequence starting from α-hydrazonocarboxylic acids. After a four-component Ugi coupling, the resulting hydrazone was engaged in a copper triggered [3 + 2] cycloaddition/aerobic oxidation cascade. ...[more]

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