Enantioselective Synthesis of Daurichromenic Acid and Confluentin
作者:Kegang Liu、Wolf-D. Woggon
DOI:10.1002/ejoc.200901403
日期:2010.2
The first asymmetric synthesis of daurichromenicacid and confluentin is described. The key step of the sequence leading to both natural products is a highly enantioselective domino aldol/oxa Michael reaction (97 % ee) of farnesal and 2-methoxy-4 -methylsalicylaldehyde.
Isolation of rhododaurichromanic acid B and the anti-HIV principles rhododaurichromanic acid A and rhododaurichromenic acid from Rhododendron dauricum
作者:Yoshiki Kashiwada、Kimihisa Yamazaki、Yasumasa Ikeshiro、Takashi Yamagishi、Toshihiro Fujioka、Kunihide Mihashi、Koichi Mizuki、L.Mark Cosentino、Keith Fowke、Susan L Morris-Natschke、Kuo-Hsiung Lee
DOI:10.1016/s0040-4020(00)01144-3
日期:2001.2
Two novel chromane derivatives (1 and 2) and the known chromene (3) were isolated from the leaves and twigs of Rhododendron dauricum. The absolute stereostructure of 1 was established by spectroscopic examination and X-ray crystallographic analysis. The absolute stereostructures of 2 and 3 were also confirmed by photochemical conversion of 3 into 1 and 2. Daurichromenic acid (3) demonstrated potent anti-HIV activity with an EC50 value of 0.00567 mug/mL and therapeutic index (TI) of 3,710. Rhododaurichromanic acid A (1) also showed relatively potent anti-HIV activity with an EC50 value of 0.37 mug/mL, and a TI of 91.9, whereas rhododaurichromanic acid B (1) displayed no anti-HIV activity. (C) 2001 Elsevier Science Ltd. All rights reserved.
[EN] DAURICHROMENIC ACID AND IT'S USE IN MEDICINE<br/>[FR] ACIDE DAURICHROMÉNIQUE ET SON UTILISATION EN MÉDECINE
申请人:[en]PHYTOTHERAPEUTIX LTD
公开号:WO2022259198A1
公开(公告)日:2022-12-15
The present invention relates to Daurichromenic acid (DCA, 2-[(3E)-4,8-Dimethyl-3,7-nonadien-1-yl]-5-hydroxy-2,7-dimethyl-2H-chromene-6-carboxylic acid or (E)-2-(4,8-dimethylnona-3,7-dien-1-yl)-5-hydroxy-2,7-dimethyl-2H-chromene-6-carboxylic acid) and its use in medicine. More particularly, it relates to the use of DCA, or salts and hydrates thereof, in targeting and/ or treating beta coronavirus infections and disease caused thereby.
[EN] TOTAL SYNTHESIS OF DAURICHROMENIC ACID<br/>[FR] SYNTHESE TOTALE DE L'ACIDE DAURICHROMENIQUE
申请人:UNIV IOWA RES FOUND
公开号:WO2004058738A1
公开(公告)日:2004-07-15
The present invention provides a method to prepare 2H-benzo[6]pyrans, such as the anti-HIV natural product daurichromenic acid (1a), by microwave-assisted tandem aldol reaction of a phenolic enolate followed by intramolecular SN2' type cyclization to form the 2H-benzo[6]pyran core structure.