An air-stable and structurally tunable chiral tBu-quinolineoxazoline/Pd(II) catalyst system has been developed for the enantioselective oxidative cascade cyclization of a variety of disubstituted olefinic substrates, with the apparent advantages of good yields and excellent enantioselectivities (up to 98% ee) and diastereoselectivities (dr >24:1). A transition-state model has also been proposed to
已开发出一种空气稳定且结构可调的手性t Bu-
喹啉恶唑啉/ Pd(II)催化剂体系,用于多种二取代烯烃底物的对映选择性氧化级联环化,具有明显的优势,即收率高和对映选择性极好(高达98 %ee)和非对映选择性(dr> 24:1)。还提出了一种过渡状态模型来解决出色的立体声控制问题。