title: Iodine-mediated construction of polyfunctionalized arylazopyrazoles from β-ketoesters or 2-arylpyrazol-3-ones and arylhydrazines.
abstract: This paper describes step-economic iodine-mediated construction of functionalized arylazopyrazoles in the presence of catalytic AgNO3 starting from simple β-ketoesters and two equivalents of arylhydrazines. This cascade reaction includes in situα-iodination of β-ketoesters, pyrazol-3-one formation, substitution with a nitrogen nucleophile, and oxidation/aromatization.
authors.affiliation: School of Chemical Engineering, Yeungnam University, Gyeongsan 712-749, Republic of Korea. yrlee@yu.ac.kr.
authors.forename: Rameshwar Prasad
authors.initials: RP
authors.lastname: Pandit
authors.forename: Sung Hong
authors.initials: SH
authors.lastname: Kim
authors.forename: Yong Rok
authors.initials: YR
authors.lastname: Lee