A process for 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 centre linked to a sulphur dative or anionic centre 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]m and [Rh(CO)LY] wherein Y is a halogen, m is a number less than 10 and L is :
wherein the R groups are independently selected from C₁ to C₂₀ alkyl, cycloalkyl, aryl, substituted aryl and optionally substituted aralkyl; the R⁵ groups are selected from hydrogen, C₁ to C₂₀ alkyl, cycloalkyl, aryl, substituted aryl, acyl and optionally substituted aralkyl groups; the R¹ to R⁴ groups are independently selected from hydrogen, C₁ to C₂₀ alkyl and optionally substituted aralkyl; X is a non-coordinating substitutent such as C₁ to C₂₀ alkyl, cycloalkyl, aryl, substituted aryl, C₁ to C₂₀ alkoxy, C₁ to C₂₀ alkylthio, trialkylsilyl or triarylsilyl, preferably, Si(CH₃)₃ or methyl and n is 0 to 4 preferably 0 or 1.
一种用于
甲醇或其活性衍
生物液相羰基化的工艺包括将
一氧化碳与液体反应组合物接触,该反应组合物包括
甲醇或其活性衍
生物、卤素
促进剂和
铑催化剂体系,
铑催化剂体系包括
铑组分和双齿
磷硫配体,该
配体包括通过由两个连接碳原子或一个连接碳原子和一个连接
磷原子组成的基本无反应骨架结构连接到一个
硫配体或阴离子中心的
磷中心。
式[Rh(CO)L]m 和[Rh(CO)LY]的新型
铑配体配合物 其中 Y 是卤素,m 是小于 10 的数字,L 是...:
其中 R 基团独立地选自 C₁ 至 C₂₀ 烷基、环烷基、芳基、取代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、取代芳基、酰基和任选取代的芳烷基;R¹ 至 R⁴ 基团独立选自氢、C₁ 至 C₂₀ 烷基和任选取代的芳烷基;X 是非配位取代基,如 C₁ 至 C₂₀ 烷基、环烷基、芳基、取代芳基、C₁ 至 C₂₀ 烷氧基、C₁至 C₂₀烷
硫基、三烷基
硅基或三芳基
硅基,优选 Si(CH₃)₃ 或甲基,n 为 0 至 4,优选 0 或 1。