Chiral Phosphoric Acid Catalyzed Atroposelective C−H Amination of Arenes
作者:Wang Xia、Qian‐Jin An、Shao‐Hua Xiang、Shaoyu Li、Yong‐Bin Wang、Bin Tan
DOI:10.1002/anie.202000585
日期:2020.4.20
their prevalence in natural products and functional OLED materials. C-H amination of arenes has been widely recognized as the most efficient approach to access these structures. Conventional strategies involving transition-metal catalysts suffer from confined substrate generality and the requirement of exogenous oxidants. Organocatalyticenantioselective C-N chiral axis construction remains elusive. Presented
transition metals are necessary in the reaction of in situ generated arynes with nitrosoarenes to give substitutedcarbazoles. Depending on the fluoride source and the solvent, either N‐arylated carbazoles or NH‐carbazoles are obtained (see scheme; DME=dimethoxyethane, OTf=trifluoromethanesulfonate). In these cascades a CC and one or two CN bonds are formed. The reactions are easy to conduct and proceed
The present invention relates to novel organic compounds containing oligocarbazoles. The compounds are useful for organic light-emitting diodes. The compounds are also useful for charge-transport and charge-blocking layers, and as hosts in the light-emissive layer for organic light emitting devices (OLEDs).
Provided are picolinamide compounds for inhibiting of Syk kinase, intermediates used in making such compounds, methods for their preparation, pharmaceutical compositions thereof, methods for inhibiting Syk kinase activity, and methods for treating conditions mediated at least in part by Syk kinase activity.
Provided are bicyclic oxa-lactam compounds for inhibition of JAK/Syk kinase, intermediates used in making such compounds, methods for their preparation, pharmaceutical compositions thereof, methods for inhibiting JAK/Syk kinase activity, and methods for treating conditions mediated at least in part by JAK/Syk kinase activity.