[N,P]-pyrrole PdCl<sub>2</sub>complexes catalyzed the formation of dibenzo-α-pyrone and lactam analogues
作者:J. V. Suárez-Meneses、A. Oukhrib、M. Gouygou、M. Urrutigoïty、J.-C. Daran、A. Cordero-Vargas、M. C. Ortega-Alfaro、J. G. López-Cortés
DOI:10.1039/c6dt01022a
日期:——
We herein report the synthesis and catalytic application of a new family of [N,P] ligandsbased on the pyrrole ring with alpha-phosphine or phosphole units. Their palladium complexes (3a–d) were obtained in very good yields and their catalytic properties were evaluated in the direct intramolecular arylation to obtain both benzopyranones and phenanthridinones. The air stable complex 3a exhibited the
A Concise Synthesis of Arnottin I via Internal Biaryl Coupling Reaction Using Palladium Reagent
作者:Takashi Harayama、Hirotake Yasuda
DOI:10.3987/com-97-s23
日期:——
Total synthesis of arnottin I (1) was accomplished via the internal aryl-aryl coupling reaction of iodo-ester (2) by the palladium-assisted cyclization reaction.
Annulation Strategies for Benzo[<i>b</i>]fluorene Synthesis: Efficient Routes to the Kinafluorenone and WS-5995 Antibiotics
作者:Ghassan Qabaja、Graham B. Jones
DOI:10.1021/jo0056186
日期:2000.10.1
Intramolecular palladium-mediated arylation approaches to benzo[b]fluorenes have been investigated. The methodology has been applied in a short synthesis of tri-O-methylkinafluorenone, providing an effective alternative td Friedel-Crafts-based approaches. During the course of this work, an acid-promoted quinolactonization of naphthoquinones was also developed, providing direct access to either ortho or para isomers as desired. Application of this methodology in syntheses of the antibiotics WS-5995A, WS-5995C, and functional analogues was demonstrated, and antitumoral activity of this class was determined.