Method for producing carboxylic acid anhydride and method for producing carboxylic acid ester
View Patent ↗Provided is a production method whereby corresponding carboxylic acid anhydrides and carboxylic acid esters can be obtained at high yield from various carboxylic acids even without a solvent and near room temperature. A method for producing a carboxylic acid anhydride represented by formula (II), the method comprising reacting a compound represented by formula (I) and a carboxylic acid in the presence of a Group II metal compound having an ionic ligand containing an oxygen atom. A method for producing a carboxylic acid ester, the method comprising reacting a carboxylic acid anhydride produced by the aforementioned method and an alcohol. In formula (I), R 1 represents a C 1-20 hydrocarbon group. In formula (II), R 2 represents a C 1-20 hydrocarbon group.
1. A method for producing a carboxylic acid anhydride of formula (II), the method comprising:
reacting a carboxylic acid comprising a group R 2 which is a C 1 -C 20 hydrocarbon group that may have a substituent with a compound of formula (I) in the presence of a Group 2 metal compound comprising an ionic ligand containing an oxygen atom as a catalyst:
where the metal of the Group 2 metal compound is macnesium or calcium and R 1 is a C 1 -C 20 hydrocarbon group,
and where R 2 in formula (II) is the R 2 group of the carboxylic acid.
2. The method according to claim 1 , wherein the Group 2 metal compound is one or more selected from the group consisting of an oxide salt, a hydroxide salt, a silicate salt, a nitrate salt, a phosphate salt, a carbonate salt, a carboxylate salt and a complex salt.
3. The method according to claim 1 , wherein the metal of the Group 2 metal compound is magnesium.
4. The method according to claim 1 wherein the compound of the formula (I) is di-t-butyl Bicarbonate.
5. The method according to claim 1 , wherein the carboxylic acid is (meth)acrylic acid.
6. A method for producing a carboxylic acid ester, the method comprising:
reacting the carboxylic acid anhydride obtained by the method according to claim 1 with an alcohol.
7. The method according to claim 6 , wherein the alcohol is aromatic alcohol.
8. A method for producing a carboxylic acid ester, the method comprising:
reacting a compound of formula (I), a carboxylic acid and an alcohol in the presence of a Group 2 metal compound comprising an ionic ligand containing an oxygen atom as a catalyst:
where R 1 is a C 1 -C 20 hydrocarbon group and the metal of the Group 2 metal compound is magnesium or calcium.
9. The method according to claim 8 , wherein the metal of the Group 2 metal compound is magnesium.
10. The method according to claim 8 , wherein the compound of the formula (I) is di-t-butyl dicarbonate.
11. The method according to claim 8 , wherein the carboxylic acid is (meth)acrylic acid.
12. The method according to claim 8 , wherein the alcohol is an aromatic alcohol.
13. The method according to claim 1 , wherein the method is conducted in the absence of solvent.
14. The method according to claim 1 , wherein the Group 2 metal compound comprising an ionic ligand containing an oxygen atom is selected from magnesium oxide, hydroxide, carbonate, hydrogen carbonate, silicate, sulfate, ammonium sulfate, nitrate, phosphate, hydrogen phosphate, ammonium phosphate, and borate salts.
15. The method according to claim 1 , wherein the Group 2 metal compound comprising an ionic ligand containing an oxygen atom is selected from magnesium carboxylate and sulfonate salts.
16. The method according to claim 1 , wherein the Group 2 metal compound comprising an ionic ligand containing an oxygen atom is selected from magnesium acetylacetonate, hexafluoroacetylacetonate, porphyrin, phthalocyanine, and cyclopentadiene complex salts.
17. The method according to claim 1 , wherein the Group 2 metal compound comprising an ionic ligand containing an oxygen atom is selected from magnesium oxide, hydroxide, carbonate, silicate, nitrate, phosphate, and carboxylic acid ester salts.
18. The method according to claim 1 , wherein the Group 2 metal compound comprising an ionic ligand containing an oxygen atom is selected from magnesium oxide, magnesium hydroxide, magnesium carbonate, magnesium carbonate hydroxide, magnesium silicate, magnesium nitrate, magnesium phosphate, magnesium acetate, magnesium benzoate, magnesium (meth)acrylate, and magnesium acetylacetonate.
19. The method according to claim 1 , wherein the Group 2 metal compound comprising an ionic ligand containing an oxygen atom is selected from magnesium carbonate hydroxide, magnesium hydroxide, magnesium oxide, magnesium acetyl acetonate, magnesium acetate tetrahydrate, magnesium benzoate trihydrate, magnesium methacrylate, magnesium silicate, magnesium phosphate octahydrate, magnesium nitrate hexahydrate, calcium oxide, calcium hydroxide, calcium acetylacetonate, and magnesium carbonate hydroxide.