A cascade cyclization approach to schweinfurthin B.

A cascade cyclization approach to schweinfurthin B.
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DOI:
10.1002/chin.200310208
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发表时间:
2002-09
期刊:
影响因子:
5.2
通讯作者:
E. Treadwell;J. Neighbors;D. Wiemer
E. Treadwell;J. Neighbors;D. Wiemer
中科院分区:
化学1区
文献类型:
--
作者:
E. Treadwell;J. Neighbors;D. Wiemer

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[反应:见正文]描述了一种合成天然产物施韦因呋喃甲素A、B和D的六氢杂菲部分的方法。关键的阳离子环化步骤中的相对立体化学是通过苯基硒取代基对赤道取向的优先选择而建立的。
[reaction: see text] A strategy for synthesis of the hexahydroxanthene moiety of the natural products schweinfurthin A, B, and D is described. The relative stereochemistry in the key cationic cyclization step is established through the preference of the phenylselenide substituent for an equatorial orientation.