Silver(I)-Catalyzed Enyne Cyclization/Aromatization of Alkyne-Tethered Cyclohexadienones to Access Meta-Substituted Phenols
作者:Anandarao Munakala、Rambabu Chegondi
DOI:10.1021/acs.orglett.0c03819
日期:2021.1.15
Herein we report a highly regioselective silver(I)-catalyzed intramolecular annulation of alkyne-tethered cyclohexadienones to access meta-substituted phenols with enone functionality, which are difficult to synthesize from conventional methods. The reaction proceeds via intramolecular 1,6-enyne cyclization followed by aromatization and subsequent oxetene ring rearrangement. This strategy has also
Ligand and substrate effects during Pd-catalyzed cyclizations of alkyne-tethered cyclohexadienones
作者:Rodolfo Tello-Aburto、Kyle A. Kalstabakken、Andrew M. Harned
DOI:10.1039/c3ob27491h
日期:——
The effects of ligand and substrate choice on the Pd-catalyzed cyclization of alkyne-tethered cyclohexadienones were examined. In the presence of a chiral ligand, the enantioselectivity of the desymmetrization is remarkably sensitive to structural changes in both the ligand and the substrate. Additionally, the regioselectivity of the reaction (5- vs. 6-memberedringformation) is dependent on the proximity