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克级碳糖合成中的分子内迈克尔/羟醛反应。

Gram-scale carbasugar synthesis intramolecular -Michael/aldol reaction.

作者信息

Banachowicz Piotr, Buda Szymon

机构信息

Faculty of Chemistry, Jagiellonian University Gronostajowa 2 30-387 Krakow Poland

出版信息

RSC Adv. 2019 Apr 26;9(23):12928-12935. doi: 10.1039/c9ra02002k. eCollection 2019 Apr 25.

DOI:10.1039/c9ra02002k
PMID:35520757
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9063748/
Abstract

Carbasugars represent an important category of natural products possessing a broad spectrum of biological activities. Lots of effort has been done to develop gram scale synthesis. We are presenting a new approach to gram scale synthesis of the carbasugar skeleton intramolecular -Michael/aldol reaction. The proposed strategy gave gram amounts of 6-hydroxy shikimic ester in a tandem process in 36% overall yield starting from d-lyxose. We have attempted to demonstrate the synthetic utility of 6-hydroxyshikimic acid derivatives by covering the important synthetic modifications and related applications, namely synthesis of protected (-)-gabosine E, (-)-MK7606, (-)-valienamine and finally unprotected methyl (-)-shikimate.

摘要

碳环糖是一类具有广泛生物活性的重要天然产物。人们为开发克级规模的合成方法付出了诸多努力。我们正在展示一种通过分子内迈克尔/羟醛反应进行碳环糖骨架克级规模合成的新方法。所提出的策略从D-来苏糖开始,通过串联过程以36%的总收率得到克级量的6-羟基莽草酸酯。我们试图通过涵盖重要的合成修饰和相关应用来证明6-羟基莽草酸衍生物的合成效用,即合成保护的(-)-加波辛E、(-)-MK7606、(-)-缬氨霉素,最后合成未保护的(-)-莽草酸甲酯。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f2/9063748/02306e91c4ab/c9ra02002k-s5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f2/9063748/395ffcfa9d0a/c9ra02002k-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f2/9063748/f5f5cf794da0/c9ra02002k-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f2/9063748/89428b1d252a/c9ra02002k-s2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f2/9063748/6ca0fa2b56a0/c9ra02002k-s3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f2/9063748/02306e91c4ab/c9ra02002k-s5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f2/9063748/395ffcfa9d0a/c9ra02002k-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f2/9063748/f5f5cf794da0/c9ra02002k-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f2/9063748/89428b1d252a/c9ra02002k-s2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f2/9063748/6ca0fa2b56a0/c9ra02002k-s3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a3f2/9063748/02306e91c4ab/c9ra02002k-s5.jpg

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