Palladium-Catalyzed Conjugate Addition of Arylboronic Acids to β,β-Disubstituted Enones in Aqueous Media: Formation of Bis-benzylic and <i>ortho</i>-Substituted Benzylic Quaternary Centers
作者:Ryan Van Zeeland、Levi M. Stanley
DOI:10.1021/acscatal.5b01272
日期:2015.9.4
Palladium-catalyzed conjugate addition of arylboronic acids to β,β-disubstituted enones in aqueousmedia is reported. Additions of a wide range of arylboronic acids to β,β-disubstituted enones occur to form ketone products bearing benzylic all-carbon quaternary centers. These reactions are promoted by a simple catalyst prepared from palladium trifluoracetate and 2,2′-bipyridine. The use of aqueous sodium trifluoracetate
Synthesis of Cyclohexanones through a Catalytic Cationic Cyclization of Alkynols or Enynes
作者:Pedro Alonso、Raquel Fontaneda、Pilar Pardo、Francisco J. Fañanás、Félix Rodríguez
DOI:10.1021/acs.orglett.8b00437
日期:2018.3.16
A novel procedure for the synthesis of cyclohexanones from alkynol or enyne derivatives through a cationic cyclization has been developed. The key points to obtain the six-membered ring derivatives are the use of starting materials containing a terminal alkyne, the use of tetrafluoroboric acid as a promoter of the cationic cyclization, and the appropriate selection of 1,1,1,3,3,3-hexafluoropropan-2-ol
Synthesis of Cyclic Alkenyl Triflates by a Cationic Cyclization Reaction and its Application in Biomimetic Polycyclizations and Synthesis of Terpenes
作者:Pedro Alonso、Pilar Pardo、Alicia Galván、Francisco J. Fañanás、Félix Rodríguez
DOI:10.1002/anie.201508077
日期:2015.12.14
cyclic alkenyl triflates. This new atom‐economical process is high yielding, scalable, technically very simple, proceeds without the need of any metallic reagent or catalyst, and more importantly, it complements and challenges conventional methodologies. We have also developed new biomimetic cationic cyclization reactions to yield interesting polycyclic compounds. As a demonstration of the potential of