作者:Thies Thiemann、Masataka Watanabe、Shuntaro Mataka
DOI:10.1039/b104648a
日期:——
The
novel areno-annelated estra-1,3,5(10),6,8,11,14,16-octaenes are
synthesized in a simple, four-step protocol. The preparation includes
a new areno-annelation of an α-bromo-δ-nitrodiene 3 incorporating
a domino Heck–cyclisation–aromatisation sequence with the nitro
functionality acting as a leaving group. The framework
of the resulting areno-annelated estra-1,3,5(10),16-tetraenes
can be dehydrogenated easily with DDQ
to give the title compounds.
本研究采用简单的四步合成法合成了新型非通道化雌烯-1,3,5(10),6,8,11,14,16-辛烯。该制备方法包括对α-溴-δ-硝基二烯 3 进行新的非沟道化反应,并结合多米诺赫克环化-芳香化序列,以硝基官能团作为离去基团。由此得到的雌甾-1,3,5(10),16-四烯的框架可以很容易地用 DDQ 进行脱氢反应,得到标题化合物。