Process for preparing glycidylphthalimide
View Patent ↗A process for preparing glycidylphtalimide or it optically active compound by reacting a phthalimide alkalimetal salt with an epihalohydrin or an optically active epihalohydrin in an alcohol solvent; or by reacting phthalimide with an epihalohydrin or an optically active epihalohydrin in the presence of an alkali metal carbonate, an alkali metal hydrogencarbonate or a quaternary ammonium salt to obtain a N-(3-halogeno-2-hydroxypropyl)phthalimide and then by cyclizing the product with an alkali metal alkoxide.
1. A process for preparing glycidylphthalimide represented by the following formula (1):
which comprises reacting in an alcohol solvent an alkali metal phthalimide represented by the following formula (2):
wherein M is an alkali metal,
with an epihalohydrin represented by the following formula (3):
wherein X is a halogen atom; or
reacting phthalimide and an epihalohydrin (3) in an organic solvent in the presence of an alkali metal carbonate, an alkali metal hydrogencarbonate or a quatenary ammonium salt (4) represented by the following formula:
R 1 R 2 R 3 R 4 N + X − (4)
wherein R 1 , R 2 , R 3 and R 4 are the same or different, C 1-16 alkyl, C 2-46 alkenyl, aryl-alkyl(C 1-16 ) or aryl, and X is chloro ion, bromo ion, iodo ion, hydrogensulfate ion or hydroxy ion,
to prepare a N-(3-halogeno-2-hydroxypropyl)phthalimide represented by the following formula (5):
wherein X is the same as defined above,
cyclizing the compound (5) with an alkali metal alkoxide, and recovering the resultant glycidylphthalimide.
2. A process for preparing glycidylphthalimide represented by the following formula (1):
which comprises reacting in an alcohol solvent an alkali metal phthalimide represented by the following formula (2):
wherein M is an alkali metal,
with an epihalohydrin represented by the following formula (3):
wherein X is a halogen atom, and recovering the resultant glycidylphthalimide.
3. The process claimed in claim 2 wherein the epihalohydrin is an optically active epihalohydrin, and the glycidylphthalimide is optically active glycidylphthalimide.
4. The process claimed in claim 2 wherein the reaction is carried out in the presence of a quaternary ammonium salt of the formula (4):
R 1 R 2 R 3 R 4 N + X − (4)
wherein R 1 , R 2 , R 3 and R 4 are the same or different, C 1-16 alkyl, C 2-16 alkenyl, aryl-alkyl(C 1-16 ) or aryl, and X is chloro ion, bromo ion, iodo ion, hydrogensulfate ion or hydroxy ion.
5. The process claimed in claim 2 wherein the halogen atom in the epihalohidorin is a chlorine atom.
6. The process claimed in claim 2 wherein the alkali metal phthalimide is potassium phthalimide.
7. The process claimed in claim 2 wherein the alcohol solvent is a secondary alcohol or a tertiary alcohol.
8. A process for preparing glycidylphthalimide represented by the following formula (1):
which comprises reacting phthalimide and an epihalohydrin represented by the following formula (3):
wherein X is a halogen atom,
in an organic solvent in the presence of an alkali metal carbonate, an alkali metal hydrogencarbonate or a quatenary ammonium salt (4) represented by the following formula:
R 1 R 2 R 3 R 4 N + X − (4)
wherein R 1 , R 2 , R 3 and R 4 are the same or different, C 1-16 alkyl, C 2-16 alkenyl, aryl-alkyl(C 1-16 ) or aryl, and X is chloro ion, bromo ion, iodo ion, hydrogensulfate ion or hydroxy ion,
to prepare a N-(3-halogeno-2-hydroxypropyl)phthalimide represented by the following formula (5):
wherein X is the same defined above,
cyclizing the compound (5) with an alkali metal alkoxide, and recovering the resultant glycidylphthalimide.
9. The process claimed in claim 8 wherein the reaction of the first step and the second step is carried out in one pot.
10. The process claimed in claim 8 wherein the epihalohydrin is an optically active epihalohydrin, and the glycidylphthalimide is optically active glycidylphthalimide.
11. The process claimed in claim 8 wherein the halogen atom in the epihalohidorin is a chlorine atom.
12. The process claimed in claim 8 wherein the organic solvent is an alcohol or an ether.
13. The process claimed in claim 12 wherein the alcohol is methanol, isopropanol or tert-butanol, and the ether is tetrahydrofuran or 1,4-dioxane.
14. The process claimed in claim 3 wherein the reaction is carried out in the presence of a quaternary ammonium salt of the formula (4):
R 1 R 2 R 3 R 4 N + X − (4)
wherein R 1 , R 2 , R 3 and R 4 are the same or different, C 1-16 alkyl, C 2-16 alkenyl, aryl-alkyl(C 1-16 ) or aryl, and X is chloro ion, bromo ion, iodo ion, hydrogensulfate ion or hydroxy ion.
15. The process claimed in claim 3 wherein the halogen atom in the optically active epihalohydrin is a chlorine atom.
16. The process claimed in claim 3 wherein the alkali metal phthalimide is potassium phthalimide.
17. The process claimed in claim 3 wherein the alcohol solvent is a secondary alcohol or a tertiary alcohol.
18. The process claimed in claim 10 wherein the halogen atom in the optically active epihalohydrin is a chlorine atom.
19. The process claimed in claim 10 wherein the organic solvent is an alcohol or an ether.
20. The process claimed in claim 19 wherein the alcohol is methanol, isopropanol or tert-butanol, and the ether is tetrahydrofuran or 1,4-dioxane.