Studies on Unsaturated 1,4-Dicarbonyl Compounds. VII. Aryl Unsaturated 1,4-Diketones and Ketonic Acids Derived from Citraconic and Mesaconic Acids, with Particular Reference to the β-[p-Bromobenzoyl]-methylacrylic Acids
Herein, we report a safe and economical multigramsynthesis of 6-fluoromenadione, an intermediate in the synthesis of novel biologically active agents. The key to this six-step sequence process involves the condensation of the readily available starting 4′-fluoropropiophenone and glyoxylic acid, a bromination–elimination sequence from 7-fluoro-3-methyltetral-1-one allowing aromatization of the naphthol
CIS-β-(p-BROMOBENZOYL)-α-METHYLACRYLIC ACID AND ITS ESTERS
作者:ROBERT E. LUTZ、DANIEL T. MERRITT、MONROE COUPER
DOI:10.1021/jo01213a012
日期:1939.3
NOVEL CHOLECYSTOKININ RECEPTOR LIGANDS
申请人:PNB Vesper Life Science Pvt Limited
公开号:EP2867205B1
公开(公告)日:2018-12-19
[EN] PREPARATION OF 6-SUBSTITUTED MENADIONES<br/>[FR] PRÉPARATION DE MÉNADIONES 6-SUBSTITUÉES
申请人:[en]CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
公开号:WO2023285509A1
公开(公告)日:2023-01-19
The present invention relates to a process for the preparation of a compound having formula (I) wherein R is selected from the group consisting of: halogen, (C1-C6)alkoxy, (C1-C6)alkyl, halo(C1-C6)alkyl, and halo(C1-C6)alkoxy, said process comprising a step of intramolecular cyclisation, a step of bromination, a step of aromatization and a step of oxidation.