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[EN] SYNTHESIS OF PHOSPHINE LIGANDS BEARING TUNABLE LINKAGE: METHODS OF THEIR USE IN CATALYSIS<br/>[FR] SYNTHÈSE DE LIGANDS DE PHOSPHINE PORTANT UNE LIAISON RÉGLABLE : PROCÉDÉS POUR LEUR UTILISATION DANS UNE CATALYSE
申请人:THE HONG KONG POLYTECHNIC UNIV SHENZHEN RESEARCH INSTITUTE
公开号:WO2017193288A1
公开(公告)日:2017-11-16
A series of novel linked indolyl phosphine ligands for transition metals, the synthesis thereof and their use in catalytic coupling reactions are provided. The ligands provide improvements of trasition-metal-catalyzed reactions, including the range of substrates scope, reaction conditions and efficieny.
reaction of 1-alkoxynaphthalenes 1 with alumina-supported copper(II) bromide or copper(II) chloride gave dimers, 4,4′-dialkoxy-1,1′-binaphthyls 3, as major products, and with Kieselguhr-supported copper(II) bromide afforded 1-bromo-4-alkoxynaphthalenes 2, while the reaction of 2-alkoxynaphthalenes 4 with alumina- or Kieselguhr-supported copper(II) bromide gave preferentially 1-bromo-2-alkoxynaphthalenes
1-烷氧基萘 1 与氧化铝负载的溴化铜 (II) 或氯化铜 (II) 反应生成二聚体 4,4'-二烷氧基-1,1'-联萘 3,作为主要产物,并与硅藻土负载的铜反应(II) 溴化物得到 1-bromo-4-alkoxynaphthalenes 2,而 2-alkoxynaphthalenes 4 与氧化铝或硅藻土负载的溴化铜 (II) 反应优先得到 1-bromo-2-alkoxynaphthalenes 5。
DABCO as a practical catalyst for aromatic halogenation with <i>N</i>-halosuccinimides
A simple and practical synthetic approach for synthesis of aromatic halides is developed. Simple Lewis base, DABCO, is used as the catalyst. This arene halogenation process proceedes conveniently and efficiently at ambient conditions, providing the desired products in good to excellent yields and selectivity.