The metabolism of 16-fluoroestradiols in vivo: Chemical strategies for restricting the oxidative biotransformations of an estrogen-receptor imaging agent
作者:Anne C. Stalford、James L. Maggs、Thomas L. Gilchrist、B.Kevin Park
DOI:10.1016/s0039-128x(97)00116-5
日期:1997.12
beta isomer was extensively glucuronylated at C(O)3 but also underwent aromatic hydroxylation and methoxylation before conjugation. Its C-17 epimer was subject to much greater aromatic hydroxylation but the catecholestrogen was O-methylated to a greater relative extent. The 16 beta-17 beta derivative underwent alicyclic as well as substantial aromatic hydroxylation and yielded numerous isomeric glucuronides
16 α-氟-17 β-、16 α-氟-17 α- 和 16 β-氟-17 β-[6,7-3H] 雌二醇是由 [6,7-3H] 雌酮通过 3 的氟化制备的,17-双(叔丁基二甲基甲硅烷氧基)-[6,7-3H]雌三烯与 N-氟吡啶鎓三氟甲磺酸盐和 16 α/β-氟[6,7-3H]雌酮与 NaBH4 的还原。三种异构体通过硅胶相高效液相色谱分离。将它们静脉内给药(4 μmol/kg 给麻醉的雄性大鼠。它们的胆汁代谢物(6 小时内剂量的 90-97%)通过高效液相色谱-质谱法表征,并与 [6,7-3H] 17 β-雌二醇 四种雌激素及其羟基化和甲氧基化的代谢物以葡萄糖醛酸苷的形式排出体外。C-16 氟化阻止了 C-16 羟基化以及 C-17 羟基的脱氢。16 α-17 β 异构体在 C(O)3 处被广泛地葡糖醛酸化,但在结合前也经历了芳香族羟基化和甲氧基化。其 C-17 差向异构体发生更大的芳香羟基化,但儿茶酚雌激素的