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(+)-卷柏双黄酮B报道结构的仿生全合成。

Biomimetic total synthesis of the reported structure of (+)-selaginedorffone B.

作者信息

Kundu Sourav, Jana Debgopal, Mandal Nilangshu, Mondal Ayan, Murmu Ranjit, Roy Nanda Kishore, Datta Ayan, Bisai Alakesh

机构信息

Department of Chemistry, Indian Institute of Science Education and Research Bhopal Bhopal Bypass Road Bhopal 462 066 Madhya Pradesh India

Department of Chemistry, Indian Institute of Science Education and Research Kolkata Mohanpur Campus, Nadia Kalyani 741 246 West Bengal India.

出版信息

Chem Sci. 2024 Jul 25;15(36):14946-53. doi: 10.1039/d4sc04103h.

DOI:10.1039/d4sc04103h
PMID:39246359
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11376052/
Abstract

The first enantioselective total synthesis of the reported structure of the structurally unique aromatic tetraterpenoid of anti-cancer potential, (+)-selaginedorffone B (2), has been accomplished from two modified abietane diterpenoids through an intermolecular Diels-Alder reaction between a bio-inspired diene 3 (HOMO counterpart) and dienophile 4 (corresponding LUMO counterpart) in a 23-step sequence, whereas the core framework of the monomeric abietane diterpenoid was constructed alkyne-activated ene-cyclization. Computational analysis was conducted to reveal the intricate regio and diastereoselectivity of this novel Diels-Alder reaction, strengthening the experimental results. The absolute configuration of the synthesized molecule was validated through X-ray studies of late-stage intermediates as well as comprehensive 2D NMR analysis.

摘要

通过一种结构独特的具有抗癌潜力的芳香族四萜类化合物(+)-卷柏双黄酮B(2)的报道结构的首次对映选择性全合成,是由两种修饰的枞酸型二萜通过生物启发的二烯3(最高占据分子轨道对应物)和亲双烯体4(相应的最低未占分子轨道对应物)之间的分子间狄尔斯-阿尔德反应,以23步序列完成的,而单体枞酸型二萜的核心骨架是通过炔烃活化的烯环化构建的。进行了计算分析以揭示这种新型狄尔斯-阿尔德反应复杂的区域和非对映选择性,从而强化了实验结果。通过对后期中间体的X射线研究以及全面的二维核磁共振分析,验证了合成分子的绝对构型。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/91bd/11410089/3461c44e1464/d4sc04103h-s4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/91bd/11410089/201f6d1f138e/d4sc04103h-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/91bd/11410089/65126e8fb55f/d4sc04103h-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/91bd/11410089/bed3ac7e0c2d/d4sc04103h-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/91bd/11410089/a36387152ae1/d4sc04103h-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/91bd/11410089/bf50f83b204e/d4sc04103h-s2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/91bd/11410089/8f583cbfc859/d4sc04103h-s3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/91bd/11410089/3461c44e1464/d4sc04103h-s4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/91bd/11410089/201f6d1f138e/d4sc04103h-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/91bd/11410089/65126e8fb55f/d4sc04103h-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/91bd/11410089/bed3ac7e0c2d/d4sc04103h-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/91bd/11410089/a36387152ae1/d4sc04103h-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/91bd/11410089/bf50f83b204e/d4sc04103h-s2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/91bd/11410089/8f583cbfc859/d4sc04103h-s3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/91bd/11410089/3461c44e1464/d4sc04103h-s4.jpg

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