Reaction #1797490

Reaction equation

neodymium nitrate

triethylamine

triethylamine

neodymium nitrate

2-methoxybenzoic acid

→

neodymium

2-methoxybenzoic acid

Yield 85.0%

Solvents

ethanol

ethanol

ethanol

ethanol

Conditions

Workup

1. 1
   OtherSpecifically, a reactor similar to that of 1-1 was used
2. 2
   workup.STIRRINGto stir a slurry solution
3. 3
   Otherobtained
4. 4
   Temperatureby cooling in an ice water bath
5. 5
   Temperaturethe solution was heated for 30 minutes at 40° C.
6. 6
   workup.STIRRINGNext, while stirring this synthesis solution
7. 7
   Otherholding at 25° C.
8. 8
   Othera solution obtained
9. 9
   Temperaturethe solution was heated to 40° C.
10. 10
    Temperaturethe clouding increased with time
11. 11
    workup.WAITAfter another 20 minutes
12. 12
    workup.ADDITIONwere further added
13. 13
    workup.STIRRINGthe solution was stirred for another hour at 40° C.
14. 14
    Temperaturecooled
15. 15
    Otherthe reaction
16. 16
    OtherNext, crystals obtained
17. 17
    Filtrationby filtering this slurry solution
18. 18
    workup.ADDITIONwere added to 200 ml of methanol
19. 19
    workup.STIRRINGstirred
20. 20
    Washwashed
21. 21
    workup.ADDITION200 ml of methanol were once again added to the crystals
22. 22
    workup.STIRRINGstirred
23. 23
    Washwashed
24. 24
    Filtrationfiltered
25. 25
    OtherThe resulting crystals were dried under reduced pressure at 50° C.

Procedure

The compound was synthesized by the same method as that for Synthesis Example 1-2 above, that is, after forming a triethylamine salt of 2-methoxybenzoic acid in anhydrous ethanol, an ethanol solution of neodymium nitrate was added while stirring. Specifically, a reactor similar to that of 1-1 was used to stir a slurry solution obtained by adding 100 ml of an anhydrous ethanol to 45.65 g (0.3 mol) of 2-methoxybenzoic acid, while dripping 30.4 g (0.3 mol) of triethylamine while maintaining at 20-30° C. by cooling in an ice water bath. After dripping about one-third of the triethylamine, the slurry disappeared and became transparent. After dripping, the solution was heated for 30 minutes at 40° C. to prepare a transparent synthesis solution of 2-methoxybenzoic acid-triethylamine salts. Next, while stirring this synthesis solution and holding at 25° C., a solution obtained by dissolving 43.8 g of neodymium nitrate into 120 ml of ethanol was dripped in. Upon completion of dripping, the solution was heated to 40° C., began to cloud after 40 minutes, and the clouding increased with time. After another 20 minutes, it became an extremely thick slurry solution, so 100 ml of ethanol were further added, and the solution was stirred for another hour at 40° C., then cooled to end the reaction. Next, crystals obtained by filtering this slurry solution were added to 200 ml of methanol, stirred and washed, then refiltered, and 200 ml of methanol were once again added to the crystals, stirred and washed, then filtered. The resulting crystals were dried under reduced pressure at 50° C., to obtain 50.83 g of a neodymium salt of 2-methoxybenzoic acid (yield 85%).

Source