A Thiourea‐Oxazoline Library with Axial Chirality: Ligand Synthesis and Studies of the Palladium‐Catalyzed Enantioselective Bis(methoxycarbonylation) of Terminal Olefins
作者:Ying‐Xiang Gao、Le Chang、Hang Shi、Bo Liang、Kittiya Wongkhan、Duangduan Chaiyaveij、Andrei S. Batsanov、Todd B. Marder、Chuang‐Chuang Li、Zhen Yang、Yong Huang
DOI:10.1002/adsc.201000070
日期:2010.10.9
We report herein the synthesis of novel chiral S,N-heterobidentate thiourea-oxazoline ligands and their application to palladium-catalyzed enantioselective bis(methoxycarbonylation)s of terminalolefins under mild conditions. Copper salts were found to play multiple roles in this reaction. Substituted 2-phenylsuccinates were obtained in >90% yield and up to 84% ee under optimized conditions.
Heteroleptic compounds containing phenylpyridine and phenylbenzimidazole are provided. The compounds may be used in organic light emitting devices, particularly as emissive dopants in the emissive layer of such devices.
Heteroleptic compounds containing phenylpyridine and phenylbenzimidazole are provided. The compounds may be used in organic light emitting devices, particularly as emissive dopants in the emissive layer of such devices.
Heteroleptic compounds containing phenylpyridine and phenylbenzimidazole are provided. The compounds may be used in organic light emitting devices, particularly as emissive dopants in the emissive layer of such devices.