Catalytic Asymmetric Homologation of α-Ketoesters with α-Diazoesters: Synthesis of Succinate Derivatives with Chiral Quaternary Centers
作者:Wei Li、Xiaohua Liu、Fei Tan、Xiaoyu Hao、Jianfeng Zheng、Lili Lin、Xiaoming Feng
DOI:10.1002/anie.201305478
日期:2013.10.4
In the presence of the L/Y(OTf)3 catalyst, the first catalytic asymmetric homologation of α‐ketoesters with α‐alkyl‐α‐diazoesters through either a 1,2‐aryl or 1,2‐alkyl shift was accomplished. Highly functionalized succinate derivatives containing a quaternary stereocenter were obtained in excellent yield and enantioselectivity under mild reaction conditions. Tf=trifluoromethanesulfonyl.
为什么不呢?在L / Y(OTf)3催化剂的存在下,通过1,2-芳基或1,2-烷基转移完成了α-酮酸酯与α-烷基-α-重氮酸酯的第一个催化不对称同系物。在温和的反应条件下,以优异的收率和对映选择性,获得了具有四级立体中心的高度官能化的琥珀酸酯衍生物。Tf =三氟甲磺酰基。