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 terminal olefins 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.
我们在本文中报道了在温和条件下新型手性S,N-异双齿硫脲-恶唑啉配体的合成及其在钯催化的末端烯烃对映选择性双(甲氧基羰基化)上的应用。发现铜盐在该反应中起多种作用。在优化条件下,以> 90%的收率和高达84%ee的价格获得取代的2-苯基琥珀酸酯。