A rapid and diverse construction of 6-substituted-5,6-dihydro-4-hydroxy-2-pyrones through double Reformatsky reaction
摘要:
A rapid and diverse synthesis of biologically important 6-substituted-5,6-dihydro-4-hydroxy-2-pyrones through a double Reformatsky reaction of aldehydes to delta-hydroxy-beta-ketoesters followed by lactonization is described. Due to the high functional group tolerance and reaction site discrimination between aldehyde, nitrile, and ester groups in the substrate, the protocol can provide the dihydropyrones with bromo, nitro, carboxylic acid, and beta-ketoester groups, which are suitable for the further derivatizations. Furthermore, the protocol has been successfully applied to the rapid total synthesis of naturally occurring Yangonin. (C) 2013 Elsevier Ltd. All rights reserved.
Highly Regio- and Stereoselective Heck Reaction of Allylic Esters with Arenediazonium Salts: Application to the Synthesis of Kavalactones
作者:Angélica Venturini Moro、Flávio Sega Pereira Cardoso、Carlos Roque Duarte Correia
DOI:10.1021/ol901416e
日期:2009.8.20
highly efficient palladium-catalyzed Heck reaction of allylic esters with arenediazoniumsalts is described. The reaction proceeds under mild conditions, with excellent to total regio- and stereochemical control and with retention of the traditional leaving group. Furthermore, the generality of the present methodology is illustrated by the short total synthesis of the natural kavalactones, yangonine,
作者:Patrícia A. Amaral、Nicolas Gouault、Myriam Le Roch、Vera L. Eifler-Lima、Michèle David
DOI:10.1016/j.tetlet.2008.07.102
日期:2008.11
Kavalactone derivatives were synthesized using a Heck reaction of the 4-methoxy-6-vinyl-5,6-dihydropyran-2-one with aryl iodides. The Suzuki-Miyaura reaction of an aryl boronic acid and (Z)-4-methoxy-6-(2-iodovinyl)-5,6-dihydropyran-2-one has also been successfully used to produce both Z and E isomers of lactones. (C) 2009 Elsevier Ltd. All rights reserved.
THERAPEUTIC COMPOUNDS AND METHODS OF USE THEREOF
申请人:KUALITY HERBCEUTICS LLC
公开号:US20180134679A1
公开(公告)日:2018-05-17
The invention provides compounds that are useful for treating or preventing cancer.
[EN] THERAPEUTIC COMPOUNDS AND METHODS OF USE THEREOF<br/>[FR] COMPOSÉS THÉRAPEUTIQUES ET LEURS MÉTHODES UTILISATION
申请人:KUALITY HERBCEUTICS LLC
公开号:WO2016179587A1
公开(公告)日:2016-11-10
The invention provides compounds that are useful for treating or preventing cancer.