[EN] METHOD FOR PRODUCING (2-METHOXYETHYL) VINYL ETHER, AND METHOD FOR REFINING (2-METHOXYETHYL) VINYL ETHER [FR] PROCÉDÉ DESTINÉ À PRODUIRE DU (2-MÉTHOXYÉTHYL) VINYL ÉTHER ET PROCÉDÉ DESTINÉ À RAFFINER LE (2-MÉTHOXYÉTHYL)VINYLÉTHER [JA] (2-メトキシエチル)ビニルエーテルの製造方法及び(2-メトキシエチル)ビニルエーテルの精製方法
[EN] METHOD FOR PRODUCING (2-METHOXYETHYL) VINYL ETHER, AND METHOD FOR REFINING (2-METHOXYETHYL) VINYL ETHER [FR] PROCÉDÉ DESTINÉ À PRODUIRE DU (2-MÉTHOXYÉTHYL) VINYL ÉTHER ET PROCÉDÉ DESTINÉ À RAFFINER LE (2-MÉTHOXYÉTHYL)VINYLÉTHER [JA] (2-メトキシエチル)ビニルエーテルの製造方法及び(2-メトキシエチル)ビニルエーテルの精製方法
Tetrakis[bis(trimethylsilyl)methyl]dialane(4) (1) reacts as recently reported with potassium in 1,2-dimethoxyethane (DME) to yield after purification the surprisingly stable radical monoanion [R2AlAlR2]·− [K(DME)3]+ (2) (R CH(SiMe3)2). With a longer reaction time of some days at room temperature and an excess of potassium, however, complete decomposition occurs under cleavage of ether molecules and formation of several
Process for preparing 2-chloro-3-alkoxy-4-alkylsulfonyl-benzoic acids and esters
申请人:Dow AgroSciences LLC
公开号:US06211403B1
公开(公告)日:2001-04-03
1-Halo-2-chloro-3-alkoxy-4-alkylsulfonylbenzene and 1-halo-2,3-dichloro-4-alkylsulfonylbenzene compounds were converted to compounds having hydroxycarbonyl or alkoxycarbonyl substituents in place of the 1-halo substituent by reaction with carbon monoxide and water or an alcohol respectively, in the presence of a palladium II salt: trihydrocarbylphosphine complex type catalyst.
Herbicidal 1-alkyl-4-(2-chloro-3-alkoxy-4-alkylsulfonylbenzoyl)-5-hydroxypyrazole compounds, as well as 1-halo-2-chloro-3-alkoxy-4-alkylsulfonylbenzene compounds and 2-chloro-3-alkoxy-4-alkylsulfonylbenzoic acid compounds, were prepared in good yield by the reaction of the corresponding 3-chloro compound with an alkali metal alkoxide compound. 1-Halo-2-chloro-3-alkoxy-4-alkylsulfonylbenzene and 1-halo-2,3-dichloro-4-alkylsulfonylbenzene compounds were converted to compounds having hydroxycarbonyl, alkoxycarbonyl, or 1-alkyl-5-hydroxypyrazole-4-carbonyl substituents in place of the 1-halo substituent by reaction with carbon monoxide and water, an alcohol, or a 1-alkyl-5-hydroxypyrazole compound, respectively, in the presence of a palladium II salt:trihydrocarbylphosphine complex type catalyst.