Syntheses and Structure−Activity Relationships of Taxoids Derived from 14β-Hydroxy-10-deacetylbaccatin III
作者:Iwao Ojima、John C. Slater、Scott D. Kuduk、Craig S. Takeuchi、Rayomand H. Gimi、Chung-Ming Sun、Young Hoon Park、Paula Pera、Jean M. Veith、Ralph J. Bernacki
DOI:10.1021/jm960563e
日期:1997.1.1
A series of new taxoids derived from 14 beta-hydroxy-10-deacetylbaccatin III was synthesized by means of the beta-lactam synthon method. Most of the new taxoids thus synthesized possess excellent cytotoxicity against human ovarian (A121), non-small-cell lung (A549), colon (HT-29), and breast (MCF-7) cancer cell lines, and several of these taxoids show subnanomolar IC50 values which are severalfold
通过β-内酰胺合成子法合成了一系列衍生自14个β-羟基-10-去乙酰基浆果赤霉素III的新的类紫杉醇。如此合成的大多数新类紫杉醇对人卵巢(A121),非小细胞肺癌(A549),结肠(HT-29)和乳腺癌(MCF-7)癌细胞系均具有出色的细胞毒性,其中一些类紫杉醇显示的亚纳摩尔IC50值比紫杉醇和多西紫杉醇好几倍至1个数量级。3'-和3'-N位置的修饰对活性产生显着影响。对于C-3'处的取代基,细胞毒性以2-呋喃基约2-甲基-1-丙烯基>或= 2-甲基丙基>(E)-1-丙烯基>或=正丙基>苯基>>的顺序降低2,2-二甲基丙基。对于3'-N取代基,活性按照t-BuOCO> Ph>正己酰基的顺序降低。通过适当修饰C-10上的取代基,可以观察到对表达多药耐药性(MDR)表型的耐阿霉素的人乳腺癌细胞MCF7-R的细胞毒性显着增加。在C-10处观察到的取代基对MCF7-R活性的显着影响可归因于有效抑制