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(11R)-13-二甲基铵基-11,13-二氢-4,5-环氧木香内酯半富马酸盐

(11R)-13-Dimethyl-ammonio-11,13-dihydro-4,5-epoxy-costunolide semifumarate.

作者信息

Neelakantan Sundar, Parkin Sean, Crooks Peter A

出版信息

Acta Crystallogr Sect E Struct Rep Online. 2009 Jun 13;65(Pt 7):o1569. doi: 10.1107/S1600536809021941.

DOI:10.1107/S1600536809021941
PMID:21582849
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC2969377/
Abstract

Crystals of the title salt, C(17)H(28)NO(3) (+)·C(4)H(3)O(4) (-), were obtained by reacting parthenolide with dimethyl-amine followed by conversion of the amine adduct into a water-soluble fumarate salt. Subsequent crystallization of the fumarate salt from water afforded colorless ortho-rhom-bic crystals. The amine addition is highly stereospecific yielding exclusively a single diastereomer with R-configuration at the newly formed C-11 chiral carbon. In the crystal, intermolecular O-H⋯O and N-H⋯O hydrogen bonds help to establish the packing.

摘要

通过将小白菊内酯与二甲胺反应,随后将胺加合物转化为水溶性富马酸盐,得到了标题盐C(17)H(28)NO(3) (+)·C(4)H(3)O(4) (-)的晶体。富马酸盐从水中重结晶得到无色正交晶系晶体。胺加成具有高度立体专一性,仅产生一种在新形成的C-11手性碳上具有R构型的单一非对映异构体。在晶体中,分子间的O-H⋯O和N-H⋯O氢键有助于形成堆积。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3ac4/2969377/c5e9b30823a6/e-65-o1569-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3ac4/2969377/4e47352b4a14/e-65-o1569-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3ac4/2969377/c5e9b30823a6/e-65-o1569-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3ac4/2969377/4e47352b4a14/e-65-o1569-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3ac4/2969377/c5e9b30823a6/e-65-o1569-fig2.jpg

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本文引用的文献

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A short history of SHELX.SHELX简史。
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Inhibition of platelet behaviour by feverfew: a mechanism of action involving sulphydryl groups.小白菊对血小板行为的抑制作用:一种涉及巯基的作用机制。
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