A nickel-catalyzed, enantioselective, three-component fluoroalkylarylation of unactivated alkenes with aryl halides and perfluoroalkyl iodides has been described. This cross-electrophile coupling protocol utilizes a chiral nickel/BiOx system as well as a pendant chelating group to facilitate the challenging three-component, asymmetric difunctionalization of unactivated alkenes, providing direct access
[EN] PROCESS FOR THE PREPARATION OF 3-[2-(3,4-DIMETHOXY-BENZOYL)-4,5-DIMETHOXY-PHENYL]-PENTAN-2-ONE<br/>[FR] PROCEDE DE PREPARATION DE 3-[2-(3,4-DIMETHOXY-BENZOYL)-4,5-DIMETHOXY-PHENYL]-PENTAN-2-ONE
申请人:EGYT GYOGYSZERVEGYESZETI GYAR
公开号:WO2004054951A1
公开(公告)日:2004-07-01
The invention relates to a process for the preparation of 3-[2-(3,4-dimethoxy-benzoyl)-4,5-dimethoxy-phenyl]-pentan-2-one of the Formula (I) starting from a compound of the general Formula (II) (wherein R1 and R2 each stands for C1-4-alkyl or together form C2-6-alkylene).
The synthesis, characterization and antimicrobialevaluation of a new series of veratric acid derivatives are presented. Preliminary in vitro antimicrobial activity of the title compounds was assessed against a panel of microorganisms including Gram-positive and Gram-negative bacteria and fungi. Some of the veratric acid derivatives exhibited significant in vitro antimicrobial activity. QSAR investigation
Novel alkylation, lactonisation and cascade coupling processes mediated by lead tetracarboxylates: the importance of ligands
作者:Mark G Moloney、Ewan Nettleton、Kirsty Smithies
DOI:10.1016/s0040-4039(01)02288-2
日期:2002.1
The reactions of lead(IV) tetracarboxylates with carboxylic acids containing unsaturated side chains is reported. At elevated temperature in toluene, facile decarboxylation or lactonisation processes are observed, depending on the length of the carboxylate side chain and in some cases further cascade coupling processes with added nucleophiles are possible. The efficiency of these processes depends on the structure of the carboxylate ligand and the mechanistic implications of these results are briefly discussed. (C) 2002 Elsevier Science Ltd. All rights reserved.
MOMOSE, TAKEFUMI;TOYLOKA, NAOKI;IKUTAI, TAKASHI;YANAGINO, HIRONOBU, HETEROCYCLES, 30,(1990) N, C. 789-793