A gram-scale laboratory synthesis of Annonaceous acetogenin mimic AA005

A gram-scale laboratory synthesis of Annonaceous acetogenin mimic AA005
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番荔枝苷模拟物 AA005 的克级实验室合成

DOI:
10.1016/j.cclet.2020.06.007
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发表时间:
2020-06
影响因子:
9.1
通讯作者:
Yao Zhu-Jun
Yao Zhu-Jun
中科院分区:
化学1区
文献类型:
--
作者:
Yu Baobao;Yao Zhu-Jun

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AA 005(1)是天然番荔枝内酯的一种有效的抗癌模拟分子,具有中心C2对称的三甘醇结构和三个立体中心。为了支持正在进行的动物研究,在这项工作中研究、优化并完成了AA 005(1)的可扩展的10步合成,从市售经济材料乙二醇和(R)-表氯醇开始。研究并优化了BF 3·Et 2 O促进的(R)-环氧氯丙烷与乙二醇的环氧化物开环反应,并成功地应用于C2对称性关键片段6a的规模化制备。进一步连续的环氧化物开口与适当的亲核试剂和亲电试剂一起阐述了两个侧链和整个骨架。通过对反应顺序的比较和优化,最终完成了AA 005(1)的多克合成,对映体和非对映体纯度均令人满意。
AA005 (1), a potent anticancer mimicking molecule of naturalAnnonaceousacetogenin, features a centralC2-symmetric triglycol moiety and three stereogenic centers. To support ongoing animal studies, a scalable 10-step synthesis of AA005 (1) has been studied, optimized and accomplished in this work, starting from commercially available economic materials ethylene glycol and (R)-epichlorohydrin. A regio- and stereo-controlled BF3·Et2O-promoted epoxide opening of (R)-epichlorohydrin with ethylene glycol was investigated, optimized and successfully applied to the scalable preparation of the crucial fragment6awithC2-symmetry. Further successive epoxide openings elaborated both two side chains and the whole skeleton with proper nucleophiles and electrophiles. Comparison and optimization of the reaction sequences finally led to completion of a new multi-gram synthesis of AA005 (1) with satisfactory enantiomeric and diastereomeric purity.
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