A Facile Cu(I)/BINAP-Catalyzed Asymmetric Approach to Functionalized Pyroglutamate Derivatives Bearing a Unique Quaternary Stereogenic Center
作者:Huai-Long Teng、Fei-Long Luo、Hai-Yan Tao、Chun-Jiang Wang
DOI:10.1021/ol202326j
日期:2011.10.21
pyroglutamate derivatives bearing a unique quaternary stereogenic center has been developed via Cu(I)/BINAP-catalyzed tandem Michael addition–elimination of α-substituted aldimino esters with Morita–Baylis–Hillman (MBH) carbonates followed by a deprotection/lactamization protocol, which performs well over a broad scope of substrates and provides biologically active pyroglutamate derivatives in good yields
通过Cu(I)/ BINAP催化的串联Michael加成反应,可以直接,轻松地获得带有独特的季生立体中心的对映体富集的焦谷氨酸衍生物,然后用Morita-Baylis-Hillman(MBH)碳酸盐消除α-取代的醛糖基酯一种脱保护/内酰胺化方案,该方案在广泛的底物上表现良好,并以良好的收率和优异的对映选择性提供了具有生物活性的焦谷氨酸衍生物。