The bicyclic depsipeptide histone deacetylase (HDAC) inhibitors burkholdacs A and B were efficiently synthesized in a highly convergent and unified manner. The synthesis features the amide coupling of a d-valine-d-cysteine- or d-allo-isoleucine-d-cysteine-containing segment with a d-methionine-containing segment to directly assemble the corresponding seco-acids, key precursors for macrolactonization
双环二肽组蛋白
去乙酰化酶(H
DAC)
抑制剂burkhol
DACs A和B以高度收敛和统一的方式高效合成。合成功能的酰胺耦合d -valine- d -cysteine-或d -异体-isoleucine- d段与含半胱
氨酸- d含蛋
氨酸片段直接装配相应的开环-acids,用于macrolactonization关键前体。使用同样的方法,5,6,20三-外延还合成了-burkhol
DACA。合成的双肽肽的H
DAC抑制试验和细胞生长抑制分析表明,与临床批准的双肽肽FK228(romidepsin)相比,这类双环双肽肽的效价顺序更高。还揭示了这类化合物中的新型结构-活性关系。