Hydrochloric Acid → 5-[3-[3-methoxy-4-[2-[(E)-styryl]-4-oxazolylmethoxy]phenyl]propyl]-2,4-oxazolidinedione

HRID 1584298Notes

Reaction equation

HRID 1584298 reaction equation
[H-].[Na+].[OH:3][C:4]1[CH:9]=[CH:8][C:7]([CH2:10][CH2:11][CH2:12][CH:13]2[O:17][C:16](=[O:18])[NH:15][C:14]2=[O:19])=[CH:6][C:5]=1[O:20][CH3:21].Cl[CH2:23][C:24]1[N:25]=[C:26](/[CH:29]=[CH:30]/[C:31]2[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=2)[O:27][CH:28]=1.Cl>CN(C)C=O.O>[CH3:21][O:20][C:5]1[CH:6]=[C:7]([CH2:10][CH2:11][CH2:12][CH:13]2[O:17][C:16](=[O:18])[NH:15][C:14]2=[O:19])[CH:8]=[CH:9][C:4]=1[O:3][CH2:23][C:24]1[N:25]=[C:26](/[CH:29]=[CH:30]/[C:31]2[CH:36]=[CH:35][CH:34]=[CH:33][CH:32]=2)[O:27][CH:28]=1

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 24758Sodium hydrideHCID 220097524-Chloromethyl-2-styryl-oxazoleHCID 698304715-[3-(4-Hydroxy-3-methoxyphenyl)propyl]-2,4-oxazolidinedione

Product 1

HCID 698307745-[3-[3-methoxy-4-[2-[(E)-styryl]-4-oxazolylmethoxy]phenyl]propyl]-2,4-oxazolidinedioneYield 66%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

Sodium hydride (60% in oil, 0.32 g) was added, at 0° C., to a solution of 5-[3-(4-hydroxy-3-methoxyphenyl]propyl]-2,4-oxazolidinedione (1.0 g) in N,N-dimethylformamide (DMF) (20 ml). The mixture was stirred for one hour at room temperature. To the reaction mixture was then added 4-chloromethyl-2-[(E)-styryl]oxazole (0.87 g), which was stirred for 3.5 hours at 90° C. The reaction mixture was poured into water, which was acidified with 2N HCl, followed by extraction with ethyl acetate. The ethyl acetate layer was washed with water, dried (MgSO4) and concentrated under reduced pressure to yield 5-[3-[3-methoxy-4-[2-[(E)-styryl]-4-oxazolylmethoxy]phenyl]propyl]-2,4-oxazolidinedione (1.1 g, 66%). The product was recrystallized from ethyl acetate-hexane to give colorless prisms, m.p.178-179° C.

Workup

  1. extractionfollowed by extraction with ethyl acetate
  2. washThe ethyl acetate layer was washed with water
  3. dry with materialdried (MgSO4)
  4. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-3361ca4e737c4b87b3b68f6119f8dafa
Source dataset
uspto-grants-1999_08
Patent number
US05932601

Reaction notes

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