Efficient synthesis of functionalized [7]helicenes
Efficient synthesis of functionalized [7]helicenes
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DOI：
10.1021/jo981380y
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发表时间：
1998-10-16
影响因子：
3.6
通讯作者：
Katz, TJ
中科院分区：
文献类型：
--
作者：
Fox, JM;Goldberg, NR;Katz, TJ
[7]Helicenebisquinones can be made easily and in quantity by reacting the silyl enol ethers of a 9,10-dialkoxy-, or better a 9,10-disiloxy-, 3,6-diacetylphenanthrene, with p-benzoquinone. If an ethyl, enol ether is used in place of the silyl enol ether, the transformation proceeds in much lower yield. The [7]helicenes are efficiently resolved into their enantiomers, and absolute configurations are assigned.
