17.alpha.-bromo-.alpha. and 17.alpha.-iodo-vinyl-estrane derivatives of general formula I ##STR1## wherein X is a bromine or iodine atom in Z or E position, R.sup.1 is hydrogen, hydroxy or acyloxy with up to 3 C atoms, R.sup.2 is hydrogen, alkyl with up to 3 C atoms and alkanoyl and aroyl with up to 7 C atoms, R.sup.3 is hydrogen or methyl, R.sup.4 is a hydrogen atom in the .alpha. or .beta. position, R.sup.5 is hydrogen, methyl or methoxy and R.sup.6 is hydrogen or methyl, are pharmacologically effective with a profile of action like ethinylestradiol and in the form of their radioactively labeled compounds are also valuable diagnostic media. The Z-isomers can be prepared by a new process by reaction of the corresponding 17.alpha.-ethinyl steroids with trialkyl (or phenyl) tin hydride with addition of a free radical former.
Synthesis, receptor binding, and tissue distribution of 7.alpha.- and 11.beta.-substituted (17.alpha.,20E)- and (17.alpha.,20Z)-21-[125I]iodo-19-norpregna-1,3,5(10),20-tetraene-3,17-diols
作者:H. Ali、J. Rousseau、M. A. Ghaffari、Johan E. Van Lier
DOI:10.1021/jm00106a054
日期:1991.2
configuration. The 20Z isomers 6 exhibited slightly higher receptor binding affinities than the 20E isomers 3, with all eight isomeric products giving relative binding affinity values in the 20-50 range. The 11 beta- and 7 alpha-substituted (iodovinyl)estradiols gave substantially higher estrogen receptor-mediated uterusuptake as compared to the nonsubstituted parent molecule. Synergism between the effect of
(17α,20E)-和(17α,20Z)-(碘乙烯基)雌二醇3和6的11个β-甲氧基,11个β-乙氧基和7个α-甲基衍生物,以及未加载体的评估[125 I]碘乙烯基类似物的相对靶组织保留和对雌激素受体的结合亲和力。通过在H 2 O 2或氯胺-T存在下,将相应的三丁基锡烷基前体脱甲锡,并保持构型,来制备异构的碘乙烯基和[125I]碘乙烯基衍生物。20Z异构体6的受体结合亲和力比20E异构体3略高,所有八个异构体产物的相对结合亲和力值都在20-50范围内。与未取代的母体分子相比,11个β和7个α-取代的(碘乙烯基)雌二醇给出了更高的雌激素受体介导的子宫摄取。从[125I] -3和-6的体内分布模式,可以明显看出11个β-或7个α-取代基的作用与碘乙烯基的构型之间的协同作用。注射后2 h,11β-甲氧基衍生物3b的20E异构体观察到最佳子宫吸收。但是,在注射后5 h,20Z异构体6b的子宫浓度高