An easily available Pd(OAc)2/(2-(anthracen-9-yl)-1H-inden-3-yl) dicyclohexylphosphine/toluene/iPrOH/water catalyticsystem was developed, which shows high catalytic activity in the Suzuki–Miyaura cross-coupling reactions of a diverse array of aryl and heteroaryl chlorides with Pd loadings down to 0.01 mol%.
2-(naphthalen-1-yl)anilines and p-benzoquinones through copper (II)-mediated radicalcyclisation. This unusual cyclisationreaction resulted in the robust and efficient syntheses of iptycenes with an acridinone motif. These iptycenes can be further transformed to planar acridinone heterocyclics through the Diels–Alder reaction.
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.