[DE] HERSTELLUNG VON ORGANOMAGNESIUM-VERBINDUNGEN UNTER EINSATZ VON KATALYSATOREN<br/>[EN] PRODUCTION OF ORGANOMAGNESIUM COMPOUNDS USING CATALYSTS<br/>[FR] PRODUCTION DE COMPOSES ORGANOMAGNESIENS A L'AIDE DE CATALYSEURS
申请人:STUDIENGESELLSCHAFT KOHLE MBH
公开号:WO1999033844A1
公开(公告)日:1999-07-08
(DE) Herstellung von Organomagnesium-Verbindungen aus organischen Halogeniden, insbesondere aus aromatischen Chlorverbindungen, und Magnesiummetall in Gegenwart einer Übergangsmetall-Verbindung als Katalysator.(EN) The invention relates to the production of organomagnesium compounds from organic halogenides, especially aromatic chlorine compounds, and metallic magnesium in the presence of a transitional metal compound as catalyst.(FR) L'invention concerne la production de composés organomagnésiens à partir d'halogénures organiques, notamment des composés chlorés aromatiques, et de métal magnésium en présence d'un composé de métal de transition comme catalyseur.
Aminals, which are used as protecting groups in syntheses and are part of many biologically active compounds, are normally prepared from aldehydes and diamines under conditions that remove water in order to shift the equilibrium to the side of the aminal. Here we report for the first time that aminals can be prepared and isolated in pure water without a catalyst in high yield and purity. (C) 2004 Elsevier Ltd. All rights reserved.
Transition Metal Catalyzed Preparation of Grignard Compounds