Manufacture of an epoxyethyl carboxylate or glycidyl carboxylate
View Patent ↗The invention relates to a process for the manufacture of an epoxyethyl carboxylate or glycidyl carboxylate, including reacting a vinyl carboxylate or an allyl carboxylate using an oxidant and a water-soluble manganese complex in an aqueous reaction medium, and the water-soluble manganese complex comprises an oxidation catalyst, characterized in that the water-soluble manganese complex is a mononuclear species of the general formula (I) [LMnX 3 ]Y (I), or a binuclear species of the general formula (II): [LMn(μ-X) 3 MnL]Y n (II), wherein Mn is a manganese; L is a ligand and each L is independently a polydentate ligand, each X is independently a coordinating species and each μ-X is independently a bridging coordinating species, Y is a non-coordinating counter ion, and wherein the epoxidation is carried out at a pH in the range of from 1.0 to 7.0.
1. A process for the epoxidation of a vinyl carboxylate or an allyl carboxylate, comprising:
reacting a vinyl carboxylate or an allyl carboxylate using an oxidant and a water-soluble manganese complex in an aqueous reaction medium, wherein the aqueous reaction medium comprises a 100% water phase excluding any of the vinyl carboxylate or the allyl carboxylate and/or the corresponding oxides dissolved therein, wherein the molar ratio of a vinyl carboxylate or an allyl carboxylate to oxidant is from greater than 1:1 to 12:1 and wherein the water-soluble manganese complex comprises:
a mononuclear species of the general formula (I):
[LMnX 3 ]Y (I),
or a binuclear species of the general formula (II):
[LMn(μ-X) 3 MnL]Y n (II),
wherein Mn is a manganese; each L is independently a polydentate ligand of triazacyclononane or a substituted triazacyclononane, each X is independently a coordinating species selected from the group consisting of: RO − , Cl − , Br − , I − , F − , NCS − , N 3 − , I 3 − , NH 3 , NR 3 , RCOO − , RSO 3 − , RSO 4 − , OH − , O 2− , O 2 2− , HOO − , H 2 O, SH − , CN − , OCN − , and S 4 2− and combinations thereof, and R is a C 1 -C 20 radical selected from the group consisting of alkyl, cycloalkyl, aryl, benzyl and combinations thereof, and each μ-X is independently a bridging coordinating species selected from the group consisting of: RO − , Cl − , Br − , I − , F − , NCS − , N 3 − , I 3 − , NH 3 , NR 3 , RCOO − , RSO 3 − , RSO 4 − , OH − , O 2− , O 2 2− , HOO − , H 2 O, SH − , CN − , OCN − , and S 4 2− and combinations thereof, and R is a C 1 -C 10 radical selected from the group consisting of alkyl, cycloalkyl, aryl, benzyl and combinations thereof,
wherein Y is a non-coordinating counter ion selected from the group consisting of RO − , Cl − , Br − , I − , F − , SO 4 2− , RCOO − , PF 6 − , acetate, tosylate, triflate, and a combination thereof, and R is a C 1 -C 20 radical selected from the group consisting of alkyl, cycloalkyl, aryl, benzyl and combinations thereof, n is 1 or 2, and wherein the aqueous reaction medium further comprises a buffer system to stabilize the pH and the epoxidation is carried out at a pH in the range of from 2 to 5, and
wherein the vinyl carboxylate or the allyl carboxylate is represented by an ester of the following formulae:
R 1 (C(O)OCH═CH 2 ) n ; or
R 1 ′(C(O)OCH 2 CH═CH 2 ) n ,
wherein R 1 is a mono or polyvalent radical of 6 or more carbon atoms and R 1 ′ is a mono or polyvalent radical of 5 or more carbon atoms, wherein n corresponds to the number of ester groups and comprises an integer of 1 or greater, and wherein the total number of carbon atoms in the ester comprises 9 or more carbon atoms, wherein R 1 optionally contains 1 or more heteroatoms, and wherein R 1 ′ optionally contains 1 or more heteroatoms.
2. The process of claim 1 , wherein the reaction further comprises stirring.
3. The process of claim 1 , wherein a binuclear water-soluble manganese complex comprises a catalyst.
4. The process of claim 1 , wherein the catalyst comprises a molar ratio of catalyst versus the oxidant of from 1:100 to 1:10,000,000.
5. The process of claim 1 , wherein the aqueous reaction medium is in a biphasic system comprising an organic phase and the aqueous reaction medium.
6. The process of claim 1 , wherein the oxidant comprises hydrogen peroxide, dilute hydrogen peroxide, or precursors of hydrogen peroxide.
7. The process of claim 1 , wherein the molar ratio of the vinyl carboxylate or allyl carboxylate to the oxidant is from 2:1 to 10:1.
8. The process of claim 1 wherein the allyl carboxylate is selected from non-aromatic cyclic compounds, aliphatic functionalized allyl esters of nine or more carbon atoms, aromatic mono or di allyl esters of 15 carbon atoms or more, aromatic functionalized mono, bis tris or poly allyl esters of 11 or more carbon atoms, non-aromatic cyclical mono or di allyl esters, tri allyl esters, and combinations thereof.
9. The process of claim 1 wherein the vinyl carboxylate or the allyl carboxylate is selected from the group consisting of vinyl neononanoate, allyl neononanonate, vinyl neodecanoate, allyl neodecanoate, and combinations thereof.
10. The process of claim 1 , wherein the oxidant is added to the aqueous reaction medium at a rate about equal to the reaction rate.
11. The process of claim 1 , wherein the reacting is performed in a batch process, in a continuous process or in a semi-continuous process.
12. The process of claim 1 , wherein the vinyl carboxylate or the allyl carboxylate is represented by an ester of the following formulae:
R 1 (C(O)OCH═CH 2 ) n ; or
R 1 ′(C(O)OCH 2 CH═CH 2 ) n ,
wherein R 1 is a mono or polyvalent radical from 6 to 100 carbon atoms and R 1 ′ is a mono or polyvalent radical from 5 to 100 carbon atoms, wherein n corresponds to the number of ester groups and comprises an integer of 1 or greater, and wherein the total number of carbon atoms in the ester comprises 9 or more carbon atoms.
13. The process of claim 1 , wherein the aqueous reaction medium comprises a buffer system to catalyst molar ratio of 60:1 to 300:1.
14. The process of claim 1 , wherein the manganese complex comprises the formula [Mn IV 2 (μ-O) 3 L 2 ]Y 2 , wherein L is a triazacyclononane or substituted triazacyclononane and the counterion Y is PF 6 − or CH 3 CO 2 − .
15. The process of claim 1 , wherein the vinyl carboxylate or the allyl carboxylate is represented by an ester of the following formulae:
R 1 (C(O)OCH═CH 2 ) n ; or
R 1 ′(C(O)OCH 2 CH═CH 2 ) n ,
wherein R 1 is a mono or polyvalent radical of 6 or more carbon atoms and R 1 ′ is a mono or polyvalent radical of 5 or more carbon atoms, wherein n corresponds to the number of ester groups and comprises an integer of 1 or greater, and wherein the total number of carbon atoms in the ester comprises 9 or more carbon atoms, wherein R 1 optionally contains 1 or more heteroatoms, and wherein R 1 ′ optionally contains 1 or more heteroatoms.
16. The process of claim 12 , wherein the vinyl carboxylate or the allyl carboxylate is selected from the group of allyl ester of a dimer acid, allyl ester of versatic-10 acid, diallyl ester of tetrahydrophthalic acid, diallyl ester of terephthalic acid, diallyl ester of succinic acid, allyl ester of salicylic acid, diallyl ester of phthalic acid, diallyl ester of methyl hexahydrophthalic acid, diallyl ester of oxalic acid, diallyl ester of hexahydrophobic acid, allyl ester of benzoic acid, allyl ester of 3 phenyl propionic acid, and tetra allyl ester of 1,2,3,4 tetracarboxybutane, allyl ester of neodecanoic acid, allyl ester of cyclohexane-1,2,4-tricarboxylic acid (H-TMA), respective vinyl-containing combinations thereof, respective allyl-containing combinations thereof, and combinations thereof.