Preparation and palladium-catalysed cross-coupling reactions of 3- and 4-tributylstannylfuran-2(5H)-ones
作者:Gregory J. Hollingworth、Gemma Perkins、Joseph Sweeney
DOI:10.1039/p19960001913
日期:——
Stannylfuranones 1 and 2 were prepared by ipso radical desulfurative stannylation of phenylsulfanylfuranones 3 and 16. Compounds 1 and 2 underwent Stille coupling reactions with aryl iodides to give 3- and 4-arylfuran-2(5H)-ones.
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).
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:——
Preparation and reactions of 3- and 4-tributylstannyl-2-(5H)-furanones: Preparation of aryl furanones
作者:Gregory J. Hollingworth、J.B. Sweeney
DOI:10.1016/s0040-4039(00)60930-9
日期:1992.11
3- and 4-trialkylstannylfuranones (2) and (3) have been prepared by an interesting desulphurative stannylation reaction; 3- and 4-substituted 2-(5H)-Furanones (12) and (13) may be prepared via palladium-catalysed cross coupling of (2) and (3) with aryl iodides