Estrones have been subjected to an addition reaction with [(4-ethynylphenyl)azo]pyrrolidine to provide 17 α-4-[(pyrrolidin-1-yl)-azo]phenylethynyl}estra-3,17 β -diols. A subsequent iodination with iodotrimethylsilane, produced in situ from chlorotrimethylsilane and NaI, leads to 17α-(piodophenylethynyl) estra-3,17 β -diols. This reaction can also be carried out with Na125 I to give radiolabelled estra-3,17 β -diols, which are potentially useful radiodiagnostic agents for the detection of estrogen positive breast cancer. The stability of the radiolabelled compounds is exemplified in a stability study of 3-O-methyl 17 α-(p-[125 I]iodophenylethynyl)estra-1,3,5(10),6-tetraene-17 β -ol in acetonitrile.
雌酮已经与[(4-乙炔基苯基)偶氮]吡咯烷进行加成反应,形成17α-4-[(吡咯烷-1-基)-偶氮]苯基乙炔基}雌-3,17β-二醇。随后,使用氯甲基三甲基硅烷和NaI生成的现场产物碘化三甲基硅烷进行碘化,得到17α-(碘苯基乙炔基)雌-3,17β-二醇。这种反应也可以用Na125I进行,从而得到放射性标记的雌-3,17β-二醇,这些化合物可能是检测雌激素阳性乳腺癌的有用放射性诊断试剂。在乙腈中的稳定性研究中,3-O-甲基17α-(p-[125I]碘苯基乙炔基)雌-1,3,5(10),6-四烯-17β-醇的放射性标记化合物的稳定性得到了说明。