Derivatives of a Novel Cyclopeptolide. 1. Synthesis, Antifungal Activity, and Structure-Activity Relationships
作者:Gerhard Emmer、Maximilian A. Grassberger、Josef G. Meingassner、Gerhard Schulz、Michael Schaude
DOI:10.1021/jm00039a002
日期:1994.6
The synthesis of a series of derivatives of the novel antifungal cyclopeptolide 1, which consists of nine S-amino acids and R-lactic acid, is described. Besides functional group variation of MeAsp4 (esters 2a-d, amides 3a-d, alcohol 4, and its derivatives) and Tyr(Me)9 (demethyl derivative 8, ethers 12a-f, 13, and oxidative degradation of the phenyl group to 14), opening of the lactone by LiOH in THF/H2O
描述了由9种S-氨基酸和R-乳酸组成的新型抗真菌环肽1的一系列衍生物的合成。除了MeAsp4(酯2a-d,酰胺3a-d,醇4及其衍生物)和Tyr(Me)9(脱甲基衍生物8,醚12a-f,13)的官能团变化以及苯基被氧化降解为14),通过LiOH在THF / H 2 O中打开内酯允许操纵所得无环肽15中R-Hypr10的羟基。在Mitsunobu条件下将15环化,然后脱保护,得到1的S-Hypr10类似物17。通过相应的修饰的线性肽23、24、27和28通过环化获得环状十肽33和34以及环状十一肽35和36。