Hydrochloric Acid → (7E)-7-[[4-[(5-methyl-2-phenyl-1,3-oxazol-4-yl)methoxy]phenyl]methoxyimino]-7-phenylheptanoic acid

HRID 2299856Notes

Reaction equation

HRID 2299856 reaction equation
[OH-].[Na+].[CH3:3][C:4]1[O:8][C:7]([C:9]2[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=2)=[N:6][C:5]=1[CH2:15][O:16][C:17]1[CH:42]=[CH:41][C:20]([CH2:21][O:22]/[N:23]=[C:24](/[C:35]2[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=2)\[CH2:25][CH2:26][CH2:27][CH2:28][CH2:29][C:30]([O:32]CC)=[O:31])=[CH:19][CH:18]=1.CO.Cl>O1CCCC1>[CH3:3][C:4]1[O:8][C:7]([C:9]2[CH:10]=[CH:11][CH:12]=[CH:13][CH:14]=2)=[N:6][C:5]=1[CH2:15][O:16][C:17]1[CH:42]=[CH:41][C:20]([CH2:21][O:22]/[N:23]=[C:24](/[C:35]2[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=2)\[CH2:25][CH2:26][CH2:27][CH2:28][CH2:29][C:30]([OH:32])=[O:31])=[CH:19][CH:18]=1

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 887MethanolHCID 14798Sodium HydroxideHCID 11082103ethyl (7E)-7-[[4-[(5-methyl-2-phenyl-1,3-oxazol-4-yl)methoxy]phenyl]methoxyimino]-7-phenylheptanoate

Product 1

HCID 11060312(7E)-7-[[4-[(5-methyl-2-phenyl-1,3-oxazol-4-yl)methoxy]phenyl]methoxyimino]-7-phenylheptanoic acidYield 82.2%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A 1N aqueous saturated solution of sodium hydroxide (5 ml) was added to a solution of ethyl E-7-[4-(5-methyl-2-phenyl-4-oxazolylmethoxy)benzyloxyimino]-7-phenylheptanoate (730 mg) in tetrahydrofuran (10 ml)-methanol (5 ml) and stirred at room temperature for 1 hour. 1N hydrochloric acid (5.5 ml) was added to the reaction mixture and extracted with ethyl acetate. The ethyl acetate layer was washed with an aqueous saturated solution of sodium chloride, dried (MgSO4) and concentrated. The residue was recrystallized from ethyl acetate-hexane to obtain E-7-[4-(5-methyl-2-phenyl-4-oxazolylmethoxy)benzyloxyimino]-7-phenylheptanoic acid (569 mg, yield 82%) as colorless crystals. m.p. 84-85° C.

Workup

  1. extractionextracted with ethyl acetate
  2. washThe ethyl acetate layer was washed with an aqueous saturated solution of sodium chloride
  3. dry with materialdried (MgSO4)
  4. concentrationconcentrated
  5. customThe residue was recrystallized from ethyl acetate-hexane

Sources & evidence

ORD record
ord-daa21842eae24049981466d5d8dd35fa
Source dataset
uspto-grants-2002_12
Patent number
US06495581B1

Reaction notes

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