Total Synthesis of Nuclear Factor of Activated T-Cells-68 (NFAT-68): Sequential Use of Chiral Allenylsilane and Titanium Alkoxide-Mediated Reductive Coupling Bond Construction
作者:Bin Cai、Ryan W. Evans、Jie Wu、James S. Panek
DOI:10.1021/acs.orglett.6b02052
日期:2016.9.2
Highly enantioenriched chiral allenylsilanes 4 were prepared in high yield through a scalable synthetic sequence, employing a modified copper-catalyzed SN2′ reaction. These reagents were used for the production of enantioenriched homoproparglylic ethers 5, which were subjected to titanium alkoxide-mediated reductive coupling with acetylenic esters to produce (E,E)-dienes 6 bearing α,β,γ,δ-unsaturated
通过改进的铜催化的S N 2'反应,通过可扩展的合成顺序以高收率制备高度对映体富集的手性烯基硅烷4。这些试剂用于生产对映体富集的均炔丙基醚5,将其与炔属醇酯进行烷氧基钛介导的还原偶联,以生成带有α,β,γ,δ-不饱和酯的(E,E)-二烯6。依次使用两种方法,在五个步骤中合成了活化T细胞68(NFAT-68)核因子的两种对映体。