作者:Robert A. Mack、Thomas R. DeCory、Vassil St. Georgiev
DOI:10.1002/hlca.19880710413
日期:1988.6.15
A novel rearrangement of 2(5H)-furanones is described. When refluxed in aq. Ethanolic solution in the presence of excess KOH, the 2,5-dihydro-2-oxofuran-3-carboxamides 6 underwent a novel rearrangement to the corresponding 4,5-dihydro-4-oxo-2-(phenylamino)-3-furancarboxylic acids 1 in moderate-to-excellent yields.
N-(phenyl) or n-(phenylcyclopropyl)-2,5-dihydro-2-oxo-4, (substituted phenyl) amino-3-furancarboxamide derivatives
申请人:PENNWALT CORPORATION
公开号:EP0237028A1
公开(公告)日:1987-09-16
In accordance with this invention there are provided compounds of the formula
wherein R is selected from phenyl and phenyl mono-or disubstituted with lower alkyl, nitro, halogenated methyl, halogen, lower alkoxy and combinations thereof,
wherein R¹ is selected from hydrogen and lower alkyl; and
wherein R² is selected from phenyl, phenyl monosubstituted with lower alkyl, nitro, halogenated methyl, halogen and lower alkoxy, and trans-phenylcyclopropyl in which the phenyl group may be substituted with lower alkyl and halogen,
and a process for the production thereof. The compounds show an antiallergic activity.