Palladium-Catalyzed Reaction
of Arenediazonium Tetrafluoroborates with Methyl 4-Hydroxy-2-butenoate:
An Approach to 4-Aryl Butenolides and an Expeditious Synthesis of
Rubrolide E
The present invention provides a compound of formula I and a compound of formula II, methods of use and formulations thereof.
本发明提供了一种I式化合物和一种II式化合物,以及其使用方法和配方。
WO2008/40097
申请人:——
公开号:——
公开(公告)日:——
US8586618B2
申请人:——
公开号:US8586618B2
公开(公告)日:2013-11-19
[EN] FURANONE COMPOUNDS AND LACTAM ANALOGUES THEREOF<br/>[FR] COMPOSÉS DE FURANONE ET ANALOGUES DE LACTAME DE CEUX-CI
申请人:BIOSIGNAL LTD
公开号:WO2008040097A1
公开(公告)日:2008-04-10
[EN] The present invention provides a compound of formula I and a compound of formula II, methods of use and formulations thereof. [FR] La présente invention porte sur un composé de formule (I) et sur un composé de formule (II), ainsi que sur des procédés d'utilisation et des formulations de ces composés.
Palladium-Catalyzed Reaction
of Arenediazonium Tetrafluoroborates with Methyl 4-Hydroxy-2-butenoate:
An Approach to 4-Aryl Butenolides and an Expeditious Synthesis of
Rubrolide E
The palladium-catalyzed reaction of arenediazonium tetrafluoroborates with methyl 4-hydroxy-2-butenoate in MeOH under mild conditions gives 4-arylbutenolides usually in good to high yields through a domino vinylic substitution/cyclization process. The reaction tolerates a variety of useful substituents including the whole range of halogen substituents, nitro, ether, cyano, keto, and ester groups and can be performed as a one-pot process generating the arenediazonium salt in situ. By using this method, the marine antibiotic rubrolide E has been synthesized via an expeditious and efficient sequential protocol that omits the isolation of the butenolide intermediate (two operative steps, 52% overall yield).