作者:Michael C. Pirrung、Goutam Biswas、Tannya R. Ibarra-Rivera
DOI:10.1021/ol100761z
日期:2010.5.21
Total syntheses of two recently discovered proteasome inhibitors, syringolin A and B, are reported. The key to our approach was creation of the α,β-unsaturated 12-membered lactam via intramolecular Horner−Wadsworth−Emmons reaction. Such reactions have been broadly used to prepared macrolactones, but this work presents a rarer example of its application to macrolactams. The final steps involved attachment
据报道,两种最近发现的蛋白酶体抑制剂丁香脂素A和丁香酚B的总合成。我们方法的关键是通过分子内Horner-Wadsworth-Emmons反应生成α,β-不饱和12元内酰胺。这种反应已被广泛用于制备大内酯,但是这项工作为大内酰胺提供了一个罕见的例子。最终步骤包括使用肽偶联方法,包括基于未保护的缬氨酸N-羧酸酐的方法连接双(戊烯基)脲侧链。通过交叉复分解产生了丁香环素A的另外的烯烃。