Guaiane-type sesquiterpenoids from Alisma orientalis
摘要:
Two guaiane-type sesquiterpenoids named orientalol E (1) and orientalol F (3) were isolated from the rhizome of Alisina orientalis (SAM) JUZEP together with two known guaiane-type sesquiterpenoids alismol (2) and alismoxide (4). Their relative stereo-structures were elucidated by spectroscopic methods, whereas absolute stereostructures were determined on the basis of chemical correlation. (C) 2003 Elsevier Ltd. All rights reserved.
Total Syntheses of (−)-Englerins A/B, (+)-Orientalols E/F, and (−)-Oxyphyllol
作者:Pengcai Liu、Yutao Cui、Kang Chen、Xinyue Zhou、Wenyan Pan、Jun Ren、Zhongwen Wang
DOI:10.1021/acs.orglett.8b00552
日期:2018.5.4
(−)-Englerin A was synthesized in 20 steps from the commercially available material (R)-(+)-limonene. In addition, (−)-englerin B, (+)-orientalol E/F and (−)-oxyphyllol were obtained from the intermediate in the route. The key steps include a hydroxyl-directing stereoselective and regioselective intramolecular cyclopropanation and a multi-gram-scale stereoselective formal intramolecular [3 + 2] cross
A combined approach toward syntheses of epoxyguaiane sesquiterpenes is presented. By use of a fungus sesquiterpene cyclase, guaian-6,10(14)-diene was produced through metabolic engineering of the isoprenoid pathway in E. coli. (-)-Englerin A, (-)-oxyphyllol, (+)-orientatol E, and (+)-orientalol F have been synthesized in two to six steps. This strategy provided rapid access to the epoxyguaiane core
Herein, we report the semisynthetic production of the potent transient receptor potential canonical (TRPC) channel agonist englerin A (EA), using guaia 6,10(14)-diene as the starting ma-terial. Guaia-6,10(14)-diene was systematically engineered in Escherichia coli and Saccharomyces cerevisiae using the CRISPR/Cas9 system and produced with high titers. This opened the possibility for a very short semisynthesis
在此,我们报告了使用愈创木 6,10(14)-二烯作为起始材料的强效瞬时受体电位规范 (TRPC) 通道激动剂 englerin A (EA) 的半合成生产。Guaia-6,10(14)-二烯使用 CRISPR/Cas9 系统在大肠杆菌和酿酒酵母中系统工程化,并以高滴度生产。这为 EA 和两种相关愈创木酚和东方香酚 E 的非常短的半合成开辟了可能性。潜在的可扩展方法结合了合成生物学和化学合成的优势,并提供了一种生产 EA 及其类似物的有效且经济的方法。
Guaiane-type sesquiterpenoids from Alisma orientalis
Two guaiane-type sesquiterpenoids named orientalol E (1) and orientalol F (3) were isolated from the rhizome of Alisina orientalis (SAM) JUZEP together with two known guaiane-type sesquiterpenoids alismol (2) and alismoxide (4). Their relative stereo-structures were elucidated by spectroscopic methods, whereas absolute stereostructures were determined on the basis of chemical correlation. (C) 2003 Elsevier Ltd. All rights reserved.