Tetrahedron Letters

Iron complex-catalyzed N-arylation of pyrazoles under aqueous medium

HW Lee, ASC Chan, FY Kwong

Index: Lee, Hang Wai; Chan, Albert S.C.; Kwong, Fuk Yee Tetrahedron Letters, 2009 , vol. 50, # 42 p. 5868 - 5871

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Citation Number: 31

Abstract

Commercially available FeCl3· 6H2O with conformationally rigid diamine ligand is a highly effective catalyst for N-arylation of pyrazoles using aryl and heteroaryl iodides. It is notable to show that this complex is tolerable under aqueous medium and particularly the whole reaction utilizes water as the sole solvent without any additional organic co-solvents and surfactants. Attempted study using other nitrogen nucleophiles is described. This newly ...