Further Synthetic and Biological Studies on Vitamin D Hormone Antagonists Based on C24-Alkylation and C2α-Functionalization of 25-Dehydro-1α-hydroxyvitamin D<sub>3</sub>-26,23-lactones
作者:Nozomi Saito、Toshihiro Matsunaga、Hiroshi Saito、Miyuki Anzai、Kazuya Takenouchi、Daishiro Miura、Jun-ichi Namekawa、Seiichi Ishizuka、Atsushi Kittaka
DOI:10.1021/jm060797q
日期:2006.11.30
on process, and the 23,24-trans lactone derivatives were derived from these via inversion of the C23 stereochemistry. The biological evaluation revealed that both binding affinity for chick vitamin D hormone receptor and antagonistic activity (inhibition of vitamin D hormone induced HL-60 cell differentiation) were affected by the orientation and chain-length of the primary alkyl group on the lactone
高效合成和生物学评估80种新型25-脱氢-1α-羟基维生素D3-26,23S-内酯2(TEI-9647)及其23R差向异构体(3),其中内酯环通过引入描述了在C24位的C1至C4伯烷基(5组4个非对映异构体),以及它们的C2α-甲基,3-羟丙基和3-羟基丙氧基取代的衍生物。维生素D3的三烯结构是通过A环前体烯炔的钯催化烯基环化和侧链上具有C24烷基化内酯部分的CD环对应的溴烯烃而构建的。具有23,24-顺式内酯的CD环前体是通过使用铬介导的顺-选择性烯丙基化-内酯化工艺制备的,然后将23,24-顺式内酯 通过反式的C23立体化学从中衍生出24反式内酯衍生物。生物学评估表明,对鸡维生素D激素受体的结合亲和力和拮抗活性(抑制维生素D激素诱导的HL-60细胞分化)均受内酯环上伯烷基的取向和链长的影响。此外,C24烷基化的维生素D3内酯的C2alpha官能化大大增强了它们的生物学活性。最有效的化合