Hydrochloric Acid → (6E)-6-phenyl-6-[[4-[(3-phenyl-1,2,4-oxadiazol-5-yl)methoxy]phenyl]methoxyimino]hexanoic acid

HRID 2299877Notes

Reaction equation

HRID 2299877 reaction equation
O.[OH-].[Li+].[C:4]1(/[C:10](=[N:20]/[O:21][CH2:22][C:23]2[CH:28]=[CH:27][C:26]([O:29][CH2:30][C:31]3[O:35][N:34]=[C:33]([C:36]4[CH:41]=[CH:40][CH:39]=[CH:38][CH:37]=4)[N:32]=3)=[CH:25][CH:24]=2)/[CH2:11][CH2:12][CH2:13][CH2:14][C:15]([O:17]CC)=[O:16])[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1.O.Cl>O1CCCC1.C(O)C>[C:4]1(/[C:10](=[N:20]/[O:21][CH2:22][C:23]2[CH:28]=[CH:27][C:26]([O:29][CH2:30][C:31]3[O:35][N:34]=[C:33]([C:36]4[CH:41]=[CH:40][CH:39]=[CH:38][CH:37]=4)[N:32]=3)=[CH:25][CH:24]=2)/[CH2:11][CH2:12][CH2:13][CH2:14][C:15]([OH:17])=[O:16])[CH:5]=[CH:6][CH:7]=[CH:8][CH:9]=1

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 962WaterHCID 168937Lithium hydroxide, monohydrateHCID 22344629ethyl (6E)-6-phenyl-6-[[4-[(3-phenyl-1,2,4-oxadiazol-5-yl)methoxy]phenyl]methoxyimino]hexanoate

Product 1

HCID 22344640(6E)-6-phenyl-6-[[4-[(3-phenyl-1,2,4-oxadiazol-5-yl)methoxy]phenyl]methoxyimino]hexanoic acidYield 85.3%

Reagents, catalysts & solvents 2

HCID 702EthanolSolventHCID 8028TetrahydrofuranSolvent

Procedure

Lithium hydroxide monohydrate (194 mg) was added to a solution of ethyl E-6-phenyl-6-[4-(3-phenyl-1,2,4-oxadiazol-5-ylmethoxy)benzyloxyimino]hexanoate (790 mg) in tetrahydrofuran (6 ml)-water (4 ml)-ethanol (4 ml) and stirred at room temperature for 4 hours. 1N hydrochloric acid (4.7 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-6-phenyl-6-[4-(3-phenyl-1,2,4-oxadiazol-5-ylmethoxy)benzyloxyimino]hexanoic acid (637 mg, yield 85%) as colorless crystals. m.p. 91-92° 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-d64502d0a32e453587098613f07a0ea0
Source dataset
uspto-grants-2002_12
Patent number
US06495581B1

Reaction notes

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