title: Ruthenium-catalyzed C-H/CO/Olefin coupling reaction of N-arylpyrazoles. Extraordinary reactivity of N-arylpyrazoles toward carbonylation at C-H bonds.
abstract: The reaction of 1-arylpyrazoles with CO and ethylene in the presence of Ru(3)(CO)(12) resulted in regioselective carbonylation at the ortho C-H bonds. While it is found that the pyrazole ring also functions as the directing group for C-H bond cleavage, the efficiency of the reaction depends on the position of the pyrazole ring.
authors.affiliation: Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan.
authors.forename: Taku
authors.initials: T
authors.lastname: Asaumi
authors.forename: Naoto
authors.initials: N
authors.lastname: Chatani
authors.forename: Takuya
authors.initials: T
authors.lastname: Matsuo
authors.forename: Fumitoshi
authors.initials: F
authors.lastname: Kakiuchi
authors.forename: Shinji
authors.initials: S
authors.lastname: Murai