Toward palau'amine: Hg(OTf)2-catalyzed synthesis of the cyclopentane core.

Toward palau'amine: Hg(OTf)2-catalyzed synthesis of the cyclopentane core.
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DOI:
10.1002/chem.200900622
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发表时间:
2009-07-06
影响因子:
4.3
通讯作者:
Nishizawa, Mugio
Nishizawa, Mugio
中科院分区:
化学2区
文献类型:
--
作者:
Namba, Kosuke;Kaihara, Yukari;Yamamoto, Hirofumi;Imagawa, Hiroshi;Tanino, Keiji;Williams, Robert M.;Nishizawa, Mugio

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Catalytic cyclization: The Hg(OTf)2‐catalyzedN‐selective cyclization of amide carbonyl moieties for the construction of a quaternary carbon center was developed. The Hg(OTf)2‐catalyzed cyclization of cyclopentylidene alcohol with acylhydrazide afforded the desired cyclopenta[c]pyridazinone in good yield. The subsequent eight steps gave the functionalized cyclopentane with the correct stereochemistry that corresponds to the E ring of palau′amine (see scheme).
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