Dimethyl sulfite a potential agent for methylation
摘要:
The synthesis of methylated ether compounds is an important challenge. A pathway for the synthesis of methyl ethers was investigated using dimethyl sulfite (DMSi). Methylation of 1-octanol was carried out in liquid phase upon different heterogeneous organic and inorganic catalysts at 130 degrees C. Aluminium oxide gave the best result with high conversion and moderate selectivity for methyl 1-octyl ether. Reactions in gas phase at higher temperatures (200 degrees C) were also performed. Methyl 1-octyl ether was obtained in a very high level of selectivity up to 98%. Primary and secondary ethers from unsymmetrical alkyl methyl sulfite were also performed by SO2 extrusion. (C) 2015 Elsevier Ltd. All rights reserved.
Dimethyl sulfite a potential agent for methylation
摘要:
The synthesis of methylated ether compounds is an important challenge. A pathway for the synthesis of methyl ethers was investigated using dimethyl sulfite (DMSi). Methylation of 1-octanol was carried out in liquid phase upon different heterogeneous organic and inorganic catalysts at 130 degrees C. Aluminium oxide gave the best result with high conversion and moderate selectivity for methyl 1-octyl ether. Reactions in gas phase at higher temperatures (200 degrees C) were also performed. Methyl 1-octyl ether was obtained in a very high level of selectivity up to 98%. Primary and secondary ethers from unsymmetrical alkyl methyl sulfite were also performed by SO2 extrusion. (C) 2015 Elsevier Ltd. All rights reserved.
Process for the Preparation of Onium Alkylsulfonates
申请人:Ignatyev Nikolai (Mykola)
公开号:US20080221334A1
公开(公告)日:2008-09-11
The invention relates to a process for the preparation of onium alkylsulfonates by reaction of an onium halide or carboxylate with a symmetrically substituted dialkyl sulfite or with an asymmetrically substituted dialkyl sulfite at temperatures of 50 to 170° C.
Process for the Preparation of Onium Alkylsulfites
申请人:Ignatyev Nikolai (Mykola)
公开号:US20080227987A1
公开(公告)日:2008-09-18
The invention relates to a process for the preparation of onium alkylsulfites by reaction of an onium halide or carboxylate with a symmetrically substituted dialkyl sulfite or with an asymmetrically substituted dialkyl sulfite at temperatures of 0 to 70° C.
[DE] VERFAHREN ZUR HERSTELLUNG VON ONIUM-ALKYLSULFONATEN<br/>[EN] ONIUM-ALKYLSULFONATE PRODUCTION METHOD<br/>[FR] PROCEDE DE PRODUCTION D'ALKYLSULFONATES D'ONIUM
申请人:MERCK PATENT GMBH
公开号:WO2007006387A2
公开(公告)日:2007-01-18
(DE) Die Erfindung betrifft ein Verfahren zur Herstellung von Onium-Alkylsulfonaten durch Umsetzung eines Onium-Halogenids oder -Carboxylats mit einem symmetrisch substituierten Dialkylsulfit oder mit einem unsymmetrisch substituierten Dialkylsulfit bei Temperaturen von 50 bis 170°C.(EN) The invention relates to a method for producing onium-alkylsulfonates by reacting an onium halogenide or carboxylate with a symmetrically substituted dialkyl sulphite or with a asymmetrically substituted dialkyl sulphite at temperatures ranging from 50 to 170 °C.(FR) L'invention concerne un procédé de production d'alkylsulfonates d'onium par réaction d'un halogénure ou d'un carboxylate d'onium avec un sulfite de dialkyle substitué de façon symétrique ou avec un sulfite de dialkyle substitué de façon asymétrique à des températures comprises entre 50 et 170 °C.