‘Aromatic ring umpolung’, a rapid access to the main core of several natural products
作者:Kimiaka C. Guérard、Cyrille Sabot、Marc-André Beaulieu、Marc-André Giroux、Sylvain Canesi
DOI:10.1016/j.tet.2010.03.096
日期:2010.7
substituted phenols in the presence of (diacetoxyiodo)benzene promotes the formation of a phenoxenium ion, a very electrophilic species able to react with various nucleophiles leading rapidly to a plethora of different cores present in natural products via several novel oxidative processes. This strategy fits within the concept of ‘aromatic ring umpolung’; in this paper a personal account by our laboratory
An Unprecedented Oxidative Wagner−Meerwein Transposition
作者:Kimiaka C. Guérard、Clément Chapelle、Marc-André Giroux、Cyrille Sabot、Marc-André Beaulieu、Nabil Achache、Sylvain Canesi
DOI:10.1021/ol902000j
日期:2009.10.15
An oxidative Wagner−Meerwein transposition involving different functionalities mediated by a hypervalent iodine reagent has been accomplished. The strategy fits within the concept of “aromaticring umpolung” and allows rapid access to highly functionalized cores.
Oxidative 1,2- and 1,3-Alkyl Shift Processes: Developments and Applications in Synthesis
作者:Kimiaka C. Guérard、Amandine Guérinot、Cloé Bouchard-Aubin、Marc-André Ménard、Mathieu Lepage、Marc André Beaulieu、Sylvain Canesi
DOI:10.1021/jo300169k
日期:2012.3.2
transpositions enable rapid redesign of the main aromatic skeleton to generate good yields of highly functionalized scaffolds containing a prochiral dienone system, a quaternary carbon center connected to as many as four sp2 centers, and a carbonyl functionality or precursor. An efficient enantioselective version of this process resulting in the formation of a challenging quaternary carbon center is also