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One-pot construction of pyrazoles and isoxazoles with palladium-catalyzed four-component coupling. | LitMetric

One-pot construction of pyrazoles and isoxazoles with palladium-catalyzed four-component coupling.

Org Lett

Chemical Resources Laboratory, Tokyo Institute of Technology, R1-4 4259 Nagatsuta, Yokohama 226-8503, Japan.

Published: September 2005

[reaction: see text] Four-component coupling of a terminal alkyne, hydrazine (hydroxylamine), carbon monoxide, and an aryl iodide furnishes pyrazole or isoxazole derivatives in the presence of a palladium catalyst. The reaction proceeds at room temperature and an ambient pressure of carbon monoxide in an aqueous solvent system.

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Source
http://dx.doi.org/10.1021/ol051841jDOI Listing

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