A process for the production of organic carboxylic acids and organic carboxylic acid anhydrides by the catalytic reaction of an alcohol of the formula ROH and carbon monoxide in contact with an organic ester source and a homogeneous catalyst system of rhodium metal atom, a phosphorus containing ligand in which there is present at least one oxo (=0) oxygen atom attached to a phosphorus atom or a carbon atom to form a Z group and the
group in said Z group is located at least one carbon atom removed and preferably from 2-4 carbon atoms removed from the phosphorus atom of the molecules represented by the formulas
or
and a halogen source, under mild reaction conditions, wherein R' is aryl, alkaryl, aralkyl or alkyl, and wherein 1 or more of said R' groups can be substituted with a Z group but not more than 3 of said R' groups in the molecule are so substituted; a is an integer from 0-4; b is an integer from 0-3; and Z is P(O)R'R'; -C(O)OR" or C(O)R", wherein R" is R' or -H; and wherein ROH is methanol or a mixture of methanol and at least one higher alcohol.
一种生产有机
羧酸和有机
羧酸酐的工艺,该工艺通过式 ROH 的醇和
一氧化碳与有机酯源、由
金属
铑原子、含
磷配体组成的均相催化剂体系接触进行催化反应,在该催化剂体系中,至少有一个氧(=0)氧原子连接到
磷原子或碳原子上形成一个 Z 基团,所述 Z 基团中的基团位于从式 ROH 所代表的分子的
磷原子上移去至少一个碳原子的位置,最好是移去 2-4 个碳原子的位置。
在所述 Z 基团中,至少有一个碳原子与下列式子所代表的分子中的
磷原子相分离,最好分离 2-4 个碳原子
或
和卤素源,在温和的反应条件下,其中 R'为芳基、烷芳基、芳烷基或烷基,且其中 1 个或多个所述 R'基团可被 Z 基团取代,但分子中被如此取代的所述 R'基团不超过 3 个;a 是 0-4 的整数;b 是 0-3 的整数;Z 是 P(O)R'R';-C(O)OR" 或 C(O)R",其中 R" 是 R'或-H;ROH 是
甲醇或
甲醇与至少一种高级醇的混合物。