Indium-Mediated Addition of γ-Substituted Allylic Halides to N-Aryl α-Imino Esters: Diastereoselective Production of β,β′-Disubstituted α-Amino Acid Derivatives with Two Contiguous Stereocenters
作者:Nayyar Ahmad Aslam、Vadla Rajkumar、Chennakesava Reddy、Makoto Yasuda、Akio Baba、Srinivasarao Arulananda Babu
DOI:10.1002/ejoc.201200254
日期:2012.8
γ-substituted allylic halides to N-aryl (including N-PMP) α-imino- and N-acylhydrazono esters and highly diastereoselective tailoring of functionalized γ,δ-unsaturated β,β′-disubstituted N-aryl α-amino acid derivatives, bearing two contiguous stereocenters is reported. Further N-allylation of the resulting γ,δ-unsaturated β,β′-disubstituted N-aryl amino acid derivatives followed by ring closing metathesis (RCM)
螯合控制的 Barbier 型铟介导的 γ-取代的烯丙基卤化物与 N-芳基(包括 N-PMP)α-亚氨基和 N-酰基腙酯的加成以及功能化 γ,δ-不饱和 β,β' 的高度非对映选择性定制-二取代的 N-芳基 α-氨基酸衍生物,带有两个连续的立体中心。所得 γ,δ-不饱和 β,β'-二取代 N-芳基氨基酸衍生物的进一步 N-烯丙基化,然后进行闭环复分解 (RCM),合成了带有两个连续立体中心的 2,3-二取代 N-芳基四氢吡啶衍生物. 关键产品的立体化学是通过 X 射线结构分析明确确定的。