Methyl 2-(2-methyl-1-imidazolyl)-4-(4-trifluoromethylphenyl)-5-oxazolepropionate → 2-(2-Methyl-1-imidazolyl)-4-(4-trifluoromethylphenyl)-5-oxazolepropanol

HRID 395647Notes

Reaction equation

HRID 395647 reaction equation
[CH3:1][C:2]1[N:3]([C:7]2[O:8][C:9]([CH2:22][CH2:23][C:24](OC)=[O:25])=[C:10]([C:12]3[CH:17]=[CH:16][C:15]([C:18]([F:21])([F:20])[F:19])=[CH:14][CH:13]=3)[N:11]=2)[CH:4]=[CH:5][N:6]=1.O.C(C(C(C([O-])=O)O)O)([O-])=O.[K+].[Na+].O.O.[Na+].[K+].C(C(C(C([O-])=O)O)O)([O-])=O>C1(C)C=CC=CC=1>[CH3:1][C:2]1[N:3]([C:7]2[O:8][C:9]([CH2:22][CH2:23][CH2:24][OH:25])=[C:10]([C:12]3[CH:13]=[CH:14][C:15]([C:18]([F:21])([F:20])[F:19])=[CH:16][CH:17]=3)[N:11]=2)[CH:4]=[CH:5][N:6]=1

Participants

4

Reactant 2

HCID 23431813Methyl 2-(2-methyl-1-imidazolyl)-4-(4-trifluoromethylphenyl)-5-oxazolepropionateHCID 131724023(+)-Sodium potassium tartrate sesquihydrate

Product 1

HCID 234318072-(2-Methyl-1-imidazolyl)-4-(4-trifluoromethylphenyl)-5-oxazolepropanolYield 81%

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent3×

Conditions

Temperature
0 °C

Procedure

Methyl 2-(2-methyl-1-imidazolyl)-4-(4-trifluoromethylphenyl)-5-oxazolepropionate (1.00 g) was dissolved in toluene (15 ml). To the obtained solution was added dropwise a mixture of a 70% toluene solution (1.20 g) of sodium dihydrobis(2-methoxyethoxy)aluminate, and toluene (5 ml) at 0° C., which was stirred at 0° C. for 30 minutes. To the reaction mixture was carefully added a 10% aqueous solution of (+)-sodium potassium tartrate sesquihydrate (50 ml), which was stirred at room temperature for 1 hour. The precipitated crystals were filtered, washed in sequence with a 10% aqueous solution of (+)-sodium potassium tartratesesquihydrate, pure water and isopropyl ether, and air-dried to give crystals of 2-(2-methyl-1-imidazolyl)-4-(4-trifluoromethylphenyl)-5-oxazolepropanol (0.75 g, 81%). Recrystallization from ethyl acetate-isopropyl ether gave pale yellow prisms. Melting point 127-129° C.

Workup

  1. additionTo the obtained solution was added dropwise
  2. stirringwas stirred at room temperature for 1 hour
  3. filtrationThe precipitated crystals were filtered
  4. washwashed in sequence with a 10% aqueous solution of (+)-sodium potassium tartratesesquihydrate, pure water and isopropyl ether
  5. customair-dried

Sources & evidence

ORD record
ord-81db22682af64d388d0d2a192485d45e
Source dataset
uspto-grants-2003_08
Patent number
US06605629B1

Reaction notes

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