title: Regioselective synthesis of pyrazole triflones based on triflyl alkyne cycloadditions.
abstract: The regioselective synthesis of pyrazole triflones has been achieved by 1,3-dipolar cycloaddition of triflyl alkynes and hydrazonoyl chloride in the presence of Hünig's base. Pyrazolo[5,1-a]isoquinoline triflones were also regioselectively synthesized for the first time via tandem 1,3-dipolar cycloaddition/oxidative aromatization between triflyl alkynes and C,N-cyclic azomethine imines.
authors.affiliation: Department of Frontier Materials, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso, Nagoya 466-8555, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kawai
authors.forename: Zhe
authors.initials: Z
authors.lastname: Yuan
authors.forename: Etsuko
authors.initials: E
authors.lastname: Tokunaga
authors.forename: Norio
authors.initials: N
authors.lastname: Shibata