摘要:
This invention concerns a process for the selective mono oxidation of organic tertiary polyphosphines to phosphine monooxides. These monooxides are useful as ligands for transition metals in the formation of transition metal catalysts.
摘要:
A process or the liquid phase carbonylation of methanol or a reactive derivative thereof comprises contacting carbon monoxide with a liquid reaction composition comprising methanol or a reactive derivative thereof, a halogen promoter and a rhodium catalyst system comprising a rhodium component and a bidentate phosphorus-sulphur ligand, the ligand comprising a phosphorus dative center linked to a sulphur dative or anionic center by a substantially unreactive backbone structure comprising two connecting carbon atoms or a connecting carbon and a connecting phosphorus atom. Novel rhodium ligand complexes of formula [Rh(CO)L].sub.m and Rh(CO)LY] wherein Y is a halogen, m is a number less than 10 and L is ##STR1## wherein the R groups are independently selected from C.sub.1 to C.sub.20 alkyl, cycloalkyl, aryl, substituted aryl and optionally substituted aralkyl; the R.sup.5 groups are selected from hydrogen, C.sub.1 to C.sub.20 alkyl, cycloalkyl, aryl, substituted aryl, aryl and optionally substituted aralkyl groups; the R.sup.1 to R.sup.4 groups are independently selected from hydrogen, C.sub.1 to C.sub.20 alkyl and optionally substituted aralkyl; X is a non-coordinating substitutent such as C.sub.1 to C.sub.20 alkyl, cycloalkyl, aryl, substituted aryl, C.sub.1 to C.sub.20 alkoxy, C.sub.1 to C.sub.20 alkylthio, trialkylsilyl or triarylsilyl, preferably, Si(CH.sub.3).sub.3 or methyl and n is 0 to 4 preferably 0 or 1.
摘要翻译:甲醇或其活性衍生物的液相羰基化方法包括使一氧化碳与包含甲醇或其活性衍生物的液体反应组合物,卤素促进剂和包含铑组分和二齿磷硫配体的铑催化剂体系接触, 所述配体包含通过包含两个连接碳原子或连接碳和连接的磷原子的基本上不反应的主链结构连接到硫对位或阴离子中心的磷中心。 式[Rh(CO)L] m和Rh(CO)LY]的新型铑配体络合物,其中Y是卤素,m是小于10的数,L是独立地选择的R基团 C 1 -C 20烷基,环烷基,芳基,取代的芳基和任选取代的芳烷基; R5基团选自氢,C1至C20烷基,环烷基,芳基,取代的芳基,芳基和任选取代的芳烷基; R 1至R 4基团独立地选自氢,C 1至C 20烷基和任选取代的芳烷基; X是非配位取代基,例如C1至C20烷基,环烷基,芳基,取代的芳基,C1至C20烷氧基,C1至C20烷硫基,三烷基甲硅烷基或三芳基甲硅烷基,优选Si(CH3)3或甲基,n为0-4 优选0或1。
摘要:
The present invention relates to a new method of cross-coupling aryl moieties comprising reacting an arylhalide with an arylboronic acid in the presence of a palladium compound and a compound comprising a di-alkylphosphine moiety.
摘要:
The present invention relates to a new method of cross-coupling aryl moieties comprising reacting an arylhalide with an arylboronic acid in the presence of a palladium compound and a compound comprising a di-alkylphosphine moiety.
摘要:
The present invention relates to a new method of cross-coupling aryl moieties comprising reacting an arylhalide with an arylboronic acid in the presence of a palladium compound and a compound comprising a di-alkylphosphine moiety.
摘要:
The present invention relates to a new method of cross-coupling aryl moieties comprising reacting an arylhalide with an arylboronic acid in the presence of a palladium compound and a compound comprising a di-alkylphosphine moiety.