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首页> 外文期刊>Tetrahedron letters: The International Journal for the Rapid Publication of Preliminary Communications in Organic Chemistry >First stereospecific total synthesis of (-)-affinisine oxindole as well as facile entry into the C(7)-diastereomeric chitosenine stereochemistry
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First stereospecific total synthesis of (-)-affinisine oxindole as well as facile entry into the C(7)-diastereomeric chitosenine stereochemistry

机译:(-)-Affinisine oxindole的第一个立体有针对性的全合成以及容易进入C(7)-非对映异构的几丁质立体化学

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摘要

The first synthesis of (-)-affinisine oxindole was completed in an enantiospecific fashion from commercially available D-(+)-tryptophan in 10% overall yield. The asymmetric Pictet-Spengler reaction, diastereo-specific oxidative-rearrangement of a tetrahydro-beta-carboline, and stereospecific enolate-mediated palladium-catalyzed cross coupling process were key steps in the sequence. This represents the first example of a total synthesis via stereospecific entry into either the alstonisine related or epimeric chitosenine related oxindole stereochemistry depending on the presence or absence of an N-b-benzyl protecting group. (C) 2014 Elsevier Ltd. All rights reserved.
机译:(-)-Affinisine oxindole的首次合成以对映体特异性方式从市售D-(+)-色氨酸以10%的总产率完成。该序列的关键步骤是不对称的Pictet-Spengler反应,非对映特异性氧化重排的四氢β-咔啉和立体定向烯醇化物介导的钯催化的交叉偶联过程。这代表了根据存在或不存在N-b-苄基保护基,通过立体定向进入与阿尔斯通相关的或与差向异构的几丁氨酸相关的羟吲哚立体化学的总合成的第一个例子。 (C)2014 Elsevier Ltd.保留所有权利。

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