The title compounds were synthesized by the efficient route previously explored for the synthesis of enantiomeric pairs of thiolactomycin and its 3-demethyl derivative. These studies were carried out to prove the flexibility of the previously explored synthetic route to natural thiolactomycin (TLM) 1 and to examine the structure–activity relationship on the 5-position of 1. While all of the synthesized congeners lacked in vitro antibacterial activity, these studies led us to find 5-(alk-2-enyl)-TLM (ent-4d) which exhibits mammalian type I fatty acid synthase (FAS) inhibitory activity equal to that of C75, a potent inhibitor reported previously. It was also found that 5-[(E)-cycloalk-2-enylidenemethyl]-TLM (ent-5c) exhibited slightly less potent mammalian type I FAS inhibitory activity than C75.
标题化合物是通过之前探索的合成
硫代霉素对映体及其 3-去
甲基衍
生物的高效路线合成的。虽然所有合成的同系物都缺乏体外抗菌活性,但这些研究使我们发现了 5-(alk-2-enyl)-TLM(ent-4d),它对哺乳动物 I 型
脂肪酸合成酶(
FAS)的抑制活性与之前报道的强效
抑制剂 C75 相当。研究还发现,5-[(E)-
环烷-2-亚
烯基
甲基]-TLM(ent-5c)对哺乳动物 I 型
脂肪酸合成酶的抑制活性略低于 C75。