Multifunctionalization of Unactivated Cyclic Ketones via Synergistic Catalysis of Copper and Diarylamine: Access to Cyclic α-Enaminone
作者:Yang Li、Ran Zhang、Xihe Bi、Junkai Fu
DOI:10.1021/acs.orglett.8b00125
日期:2018.2.16
A multifunctionalization of unactivated cyclicketonesvia synergistic catalysis of copper and diarylamine for the direct synthesis of cyclic α-enaminone is reported for the first time. This reaction goes through oxidative α-amination, followed by a desaturation, and features mild reaction conditions, a broad substrate scope, and great functional group tolerance.
Probing Trends in Enantioinduction via Substrate Design: Palladium-Catalyzed Decarboxylative Allylic Alkylation of α-Enaminones
作者:Douglas C. Duquette、Alexander Q. Cusumano、Louise Lefoulon、Jared T. Moore、Brian M. Stoltz
DOI:10.1021/acs.orglett.0c01441
日期:2020.7.2
Herein, we report the palladium-catalyzeddecarboxylativeasymmetricallylicalkylation of α-enaminones. In addition to serving as valuable synthetic building blocks, we exploit the α-enaminone scaffold and its derivatives as probes to highlight structural and electronic factors that govern enantioselectivity in this asymmetricalkylation reaction. Utilizing the (S)-t-BuPHOX ligand in a variety of
Syntheses of chiral nopinane-annelated pyridines of C 2 and D 2 -symmetry: X-ray structures of the fused derivatives of 4,5-diazafluorene, 4,5-diaza-9 H -fluoren-9-one, and 9,9’-bi-4,5-diazafluorenylidene
作者:Eugene S. Vasilyev、Irina Yu. Bagryanskaya、Alexey V. Tkachev
DOI:10.1016/j.mencom.2017.03.006
日期:2017.3
Reaction of (+)-pinocarvone oxime with 2-morpholinocyclopent-2-enone and FeCl3·6H2O affords chiral C2-symmetric fused derivative of 4,5-diazafluorene, whose oxidation with SeO2 gives nopinane-annelated derivatives of 4,5-diaza-9Hfluoren- 9-one (C2-symmetry) and of 9,9’-bi-4,5-diazafluorenylidene (D2-symmetry). Structures of the compounds synthesized were proved by X-ray crystallography.