Nickel and Palladium Catalysis in the Stereoselective Synthesis of Functionalized Pyrrolidines: Enantioselective Formal Synthesis of (+)-α-Allokainic Acid
作者:Maxim V. Chevliakov、John Montgomery
DOI:10.1002/(sici)1521-3773(19981204)37:22<3144::aid-anie3144>3.0.co;2-y
日期:1998.12.4
products are accessible from 1 via the intermediate 2, which is obtained by Ni-catalyzed cyclization, transposition of the protecting group, and Pd-catalyzed reduction with allylic transposition. This stepwise formation of stereocenters allows a highly direct and stereoselective synthesis of the excitatory amino acid (+)-α-allokainic acid, which displays an all-trans arrangement of the substituents about the
神经兴奋性天然产物可通过中间体2从1获得,中间体2是通过Ni催化的环化,保护基的转位和Pd催化的烯丙基转位的还原而获得的。立体中心的这种逐步形成允许兴奋性氨基酸(+)-α-链烷酸的高度直接和立体选择性的合成,其显示出围绕吡咯烷环的取代基的全反式排列。TBS =叔丁基二甲基甲硅烷基。