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
中科院分区:
文献类型:
--
作者:
Yu Baobao;Yao Zhu-Jun
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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