product. The structural revision and the determination of the absolute configuration of natural penicisochroman D were achieved. Structure–activity relationship studies of the synthetic compounds as well as a series of related isochromans indicated that the enone of the furanone moiety was essential for the cytotoxicity of these compounds toward HCT116 human colon cancer cells. Pseudodeflectusin, the
Ustusorane D和Penicisochromans B–D是从ususgillus ustus 094102和Penicillium sp。中分离出来的天然异色团。分别是PSU-F40。在本文中,我们报道了(-)-ustororane D和(+)-penicisochroman B的合成以及青霉异
色烷C和D的结构。确定了天然ususoraneane D的相对构型和天然penicisochroman B的绝对构型。通过合成评估了
青霉素C的两个可能的结构,但它们的1 H和1313 C NMR数据与
天然产物的数据不一致。实现了天然青
异色满D的结构修订和绝对构型的确定。合成化合物以及一系列相关的异色团的结构-活性关系研究表明,
呋喃酮部分的烯酮对于这些化合物对HCT116人结肠癌细胞的细胞毒性至关重要。相关的天然异染色质PSeudodeflectusin可抑制细胞生长并诱导HCT116细胞凋亡。