Preparation of 3-fluoro-5-hydroxy-4-[2-phenyl-(E)-ethenyl]-2(5H)-furanone
摘要:
Synthesis of 3-fluoro-5-hydroxy-4-[2-phenyl-(E)-etheny]-2(5H)-furanone as an inhibitor of the phospholipase A(2) (PLA(2)) was described. (C) 1998 Elsevier Science S.A.
Oxygen transfer during the copper induced reaction of α,β-epoxy diazomethyl ketones
作者:L. Thijs、B. Zwanenburg
DOI:10.1016/0040-4020(80)80106-2
日期:1980.1
Reactions of α,β-epoxy diazomethyl ketones 1a-1with activated copper powder or copper(II) sulfate in methanol (or ethanol) lead to 1,1 - dialkoxy - but - 3 - ene - 2 - ones 2 (or 3) in good yields. This process of oxygentransfer proceeds via initially generated keto-carbenoids which react intramolecularly with the epoxide function to give bicyclic intermediates 10. Release of strain and subsequent
Conjugated gamma-oxybutenolide compounds for treating ulcer
申请人:KURARAY CO., LTD.
公开号:EP0350878A2
公开(公告)日:1990-01-17
Use of conjugated γ-oxybutenolide compounds represented by the general formula:
wherein R₁, R₂, R₃, R₄ and R₅ are the same or different and represent hydrogen atoms, alkyl groups, hydroxyl groups, alkoxy groups, nitro groups, cyano groups or halogen atoms, for treating and/or preventing ulcer in human beings, is provided.