Total Synthesis of the Depsipeptide FR901375 and Preliminary Evaluation of Its Biological Activity
作者:Koichi Narita、Yuya Katoh、Ken-ichi Ojima、Singo Dan、Takao Yamori、Akihiro Ito、Minoru Yoshida、Tadashi Katoh
DOI:10.1002/ejoc.201601023
日期:2016.12
The bicyclic depsipeptide FR901375 was efficiently synthesized in a highly convergent manner. The synthesis involved the condensation of a d-valine–d-valine–d-cysteine-containing segment with a (3S,4E)-3-hydroxy-7-mercapto-4-heptenoic acid–l-threonine-containing segment to directly assemble the corresponding seco-amino acid, followed by cyclization to construct the desired 16-membered macrocyclic ring
双环缩肽 FR901375 以高度收敛的方式有效合成。该合成涉及将含有 d-缬氨酸-d-缬氨酸-d-半胱氨酸的片段与含有 (3S,4E)-3-羟基-7-巯基-4-庚烯酸-l-苏氨酸的片段直接缩合为组装相应的 seco-氨基酸,然后环化以构建所需的 16 元大环。合成的 FR901375 的效力在组蛋白脱乙酰酶 (HDAC) 抑制和细胞生长抑制试验中确定,并将结果与临床批准的缩酚肽 FK228(罗米地辛)的结果进行比较。发现 FR901375 对 I 类 HDAC 1 (GI50 = 1.7 nm) 比 II 类 HDAC 6 (GI50 = 1627 nm) 显示出极高的选择性(957 倍),并显示低纳摩尔区域的细胞生长抑制 GI50 值。此外,揭示了双环缩酚肽 HDAC 抑制剂的构效关系的新方面。