作者:Sandrine Guillou、Olivier Nesmes、Mikhail S. Ermolenko、Yves L. Janin
DOI:10.1016/j.tet.2009.01.109
日期:2009.4
Following the study of the alkoxypyrazoles nitrogen's reactivitytoward arylation or alkylation reactions, we report here our results on the introduction of various aryl groups on carbon 4 position of 3-alkoxypyrazoles. This was achieved from the corresponding 4-halogeno derivatives via a Suzuki–Miyaura aryl–aryl coupling reaction. The unexpected difficulties (lack of reactivity or unwanted halogen