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Facile Access to 3,5-Dihalogenated Pyrazoles by Sydnone Cycloaddition and their Versatile Functionalization by Pd-Catalyzed Cross-Coupling Processes

✍ Scribed by Thierry Delaunay; Mazen Es-Sayed; Jean-Pierre Vors; Nuno Monteiro; Geneviève Balme

Publisher: John Wiley and Sons
Year: 2011
Tongue: English
Weight: 409 KB
Volume: 2011
Category: Article
ISSN: 1434-193X
DOI: 10.1002/ejoc.201100119

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ChemInform Abstract: Facile Access to 3,

ChemInform Abstract: Facile Access to 3,5-Dihalogenated Pyrazoles by Sydnone Cycloaddition and Their Versatile Functionalization by Pd-Catalyzed Cross-Coupling Processes.

✍ Thierry Delaunay; Mazen Es-Sayed; Jean-Pierre Vors; Nuno Monteiro; Genevieve Bal 📂 Article 📅 2011 🏛 John Wiley and Sons ⚖ 43 KB

## Abstract The 1,3‐dipolar cycloaddition of 4‐halosydnones (I) with 1‐halopropiolates produces easily separable mixtures of dihalogenated pyrazolylcarboxylic esters (III).