Iodine recycling via 1,3-migration in iodoindoles under metal catalysis
作者:Benito Alcaide、Pedro Almendros、José M. Alonso、Sara Cembellín、Israel Fernández、Teresa Martínez del Campo、M. Rosario Torres
DOI:10.1039/c3cc44073g
日期:——
3-Substituted (indol-2-yl)-α-allenols show divergent patterns of reactivity under metal catalysis. An unprecedented intramolecular 1,3-iodine migration is described.
palladium‐catalyzed C(sp) arylation/carbocyclization/iodonium migration reaction sequence has been accomplished. Novel 2‐iodo‐1‐aryl‐9H‐carbazoles are now easily available. As this result is contrary to the selectivity observed using gold catalysis, the formation of 2‐iodocarbazoles is noticeable, suggesting a metal‐controlled cyclization through chemo‐ and regioselective 1,2‐alkyl migration and 1,4‐iodonium
A Facile Synthesis of Blue Luminescent [7]Helicenocarbazoles Based on Gold-Catalyzed Rearrangement-Iodonium Migration and Suzuki-Miyaura Benzannulation Reactions
作者:Benito Alcaide、Pedro Almendros、Cristina Aragoncillo、Eduardo Busto、Carmen G. López-Calixto、Marta Liras、Víctor A. de la Peña O'Shea、Alba García-Sánchez、Hannah V. Stone
DOI:10.1002/chem.201801179
日期:2018.5.28
New azahelicenes having interesting photophysical properties have been prepared in a four‐step sequence. These [7]helicenocarbazoles are efficient blue luminophores, demonstrating the utility of gold catalysis in the preparation of advanced materials.