Azasteroids. Synthesis by Diels-Alder Reaction between Maleimides, Citraconimide, and Triazolindiones and 1-(1-Trialkylsiloxyvinyl)-3,4-dihydronaphthalene Derivatives
作者:Adnan Sultani、Harald Dietrich、Friedrich Richter、Hans-Hartwig Otto
DOI:10.1007/s00706-005-0344-5
日期:2005.9
3-Hydroxy derivatives, finally were synthesized by cleavage of the 3-methoxy group with BBr3. During these transformations the stereochemistry of the steroidal skeleton was not changed. The stereochemistry of these “unnatural” steroids was elucidated by spectroscopic methods, and compared with results from calculations, and with the configuration of natural estrane derivatives. Finally, an improved method
从马来酰亚胺或柠康酰亚胺与1-(1-甲硅烷氧基乙烯基)萘衍生物之间的 狄尔斯-阿尔德 反应中分离出具有8β,13β和14β方向的18-Nor-16-氮杂异戊二烯 衍生物。(8个 RS )-13,14,16-Triazaestrane衍生物由1,2,4-三唑啉-3,5-二酮的合成。通过甲硅烷基化获得母体11-氧代衍生物,并将其转化为11-羟基亚氨基衍生物。最后,通过用BBr 3裂解3-甲氧基合成3-羟基衍生物。。在这些转化过程中,甾体骨架的立体化学没有改变。通过光谱方法阐明了这些“非天然”类固醇的立体化学,并与计算结果以及天然雌激素衍生物的构型进行了比较。最后,开发了一种改进的合成原料6-甲氧基-1-[[(1-三烷基甲硅烷氧基)-乙烯基] -3,4-二氢萘的方法。