郭晶晶 袁長春 傅凱 荀苗苗 馬文兵 王志強 李志春



莪術烯(Curzerene)是從姜黃屬植物的根莖中分離提取的萜烯呋喃類天然產物,具有抗炎、抗癌、抗利什曼病等多種生物活性. 本文以商業化試劑(+)-馬鞭草烯酮(6)為手性原料,首先通過已知的3步反應得到關鍵酮化合物(4);4再與1,1-二甲氧基丙酮發生由TiCl4-Et3N介導的用于構建丁烯酸內酯的串聯環化反應,分別以56%和20%的收率得到天然產物isogermafurenolid(2)及其異構體8-epi-isogermafurenolid(2′);最后,2與2′經DIBAL-H還原、酸促進脫水呋喃化一鍋反應,以82%的收率合成了目標天然產物莪術烯. 該合成路線共5步, 總收率34%.
溫莪術; 欖香烯型倍半萜; 莪術烯; 全合成
O629.9A2023.035001
收稿日期: 2022-11-11
基金項目: 山西省基礎研究計劃(20210302123016)
作者簡介: 郭晶晶(1996-), 女, 山西太原人, 碩士研究生.? E-mail:1158936974@qq.com
通訊作者: 袁長春. E-mail: ycc543700483@nuc.edu.cn
Total synthesis of bioactive natural product Curzerene
GUO Jing-Jing1,2, YUAN Chang-Chun1,2, FU Kai1,2,
XUN Miao-Miao1,2, MA Wen-Bing1, WANG Zhi-Qiang1, LI Zhi-Chun1
(1.School of Chemistry and Chemical Engineering, North University of China, Taiyuan 030051, China;
2. Dezhou Industrial Technology Research Institute, North University of China, Dezhou 253034, China)
Curzerene is a natural product of terpene furans isolated from the curcuma rhizomes, which has various biological activities such as anti-inflammation, anti-cancer and anti-leishmaniasis. In this paper, commercially available (+)-verbenone (6) was utilized as chiral starting material to synthesize Curzerene in 5 steps with 34% total yield. A key ketone compound 4 was first obtained through a known three-step reaction. Then ketone 4 and 1,1-dimethoxyacetone underwent TiCl4-Et3N-mediated cyclization reaction to afford natural products isogermafurenolid (2) and its isomer 8-epi-isogermafurenolid (2′) in 56% and 20% yield, respectively. Finally, the target Curzerene was synthesized from 2 and 2′ with 82% yield by a one-pot reaction of DIBAL-H reduction and subsequent acid promoted dehydration.
Curcuma wenyuji; γ-Elemene-type sesquiterpenes; Curzerene; Total synthesis
1 引 言
姜科姜黃屬植物溫莪術是我國的傳統中藥,中醫以其根莖入藥具有行氣破瘀,通經止痛的效果[1-3]. 溫莪術根莖中含有的大量揮發油成分,通常被稱之為“莪術油”[4,5],現代醫學研究表明,莪術油具有抗炎、抗腫瘤、調節免疫、抗菌等多種藥效作用[6],其有機化學成分主要含有倍半萜醇和倍半萜烯類化合物[7],如:莪術醇、莪術雙酮、欖香烯以及莪術烯等. 鑒于莪術油巨大的醫學應用價值[8],其含有的有效活性單體也頗受關注. 例如莪術醇在治療肝癌方面具有顯著的療效[9]. 更值得一提的是,β-欖香烯作為非細胞毒性抗癌藥物,現已被列為國家級二類抗腫瘤新藥,用于治療肺癌和乳腺癌[10].
莪術烯(Curzerene,圖1)作為莪術油中另一含量較高的有效活性單體[8, 11],在醫學研究方面也倍受關注. 其一,莪術烯在炎癥治療方面展現了巨大的醫學應用前景:2006年,孫秀燕等[12]發現莪術烯對TNF-α炎癥因子的分泌具有顯著的抑制效果;……