The invention relates to a process for the manufacture of an epoxyethyl carboxylate or glycidyl carboxylate by catalytic oxidation of a vinyl or allyl carboxylate using an oxidant, preferably hydrogen peroxide, and a manganese complex wherein the catalytic oxidation is performed in an aqueous reaction medium, comprising water with less than 10% by volume of cosolvents, wherein a water-soluble manganese complex is used as oxidation catalyst, characterized in that the water-soluble manganese complex is a mononuclear species of the general formula (1):
[LMnX3]Y (I)
or a binuclear species of the general formula (II):
[LMn(µ-X)3MnL]Y2 (II)
wherein Mn is a manganese; L or each L independently is a polydentate ligand, each X independently is a coordinating species and each µ-X independently is a bridging coordinating species, whereas Y is an oxidatively-stable counterion, and wherein the epoxidation is carried out at a pH in the range of from 1.0. to 7.0.
This invention also relates to epoxyethyl esters of neoacids having from 5 to 30 carbon atoms in the acid moiety.
本发明涉及一种通过使用氧化剂(最好是
过氧化氢)和
锰络合物对
乙烯基或烯丙基
羧酸酯进行催化氧化来制造环氧乙基
羧酸酯或
缩水甘油酯的工艺,其中催化氧化在
水反应介质中进行、其中
水溶性
锰络合物用作氧化催化剂,其特征在于
水溶性
锰络合物是通式(1)的单核物质:
[LMnX3]Y (I)
或通式(II)的双核种类:
[LMn(µ-X)3MnL]Y2 (II)
其中 Mn 是
锰;L 或每个 L 独立地是多齿配位体,每个 X 独立地是配位体,每个 µ-X 独立地是桥接配位体,而 Y 是氧化稳定的反离子,环氧化作用在 pH 值为 1.0 至 7.0 的范围内进行。
本发明还涉及酸基中含有 5 至 30 个碳原子的新酸的环氧乙基酯。