title: Ugi post-condensation copper-triggered oxidative cascade towards pyrazoles.
abstract: Pyrazolidinones were prepared in a two-step sequence starting from α-hydrazonocarboxylic acids. After a four-component Ugi coupling, the resulting hydrazone was engaged in a copper triggered [3 + 2] cycloaddition/aerobic oxidation cascade.
authors: Laboratoire Chimie et Procédés, Laboratoire Chimie et procédés, UMR 7652-DCSO-CNRS- ENSTA-École Polytechnique, École Nationale Supérieure de Techniques Avancées, 32 Bd Victor, Paris 75015, France.
authors: Aurélie Dos
authors: AD
authors: Santos
authors: Laurent
authors: L
authors: El Kaim
authors: Laurence
authors: L
authors: Grimaud
authors: Caroline
authors: C
authors: Ronsseray