Dimethylformamide → ethyl (6E)-6-[[4-[(5-methyl-2-thiophen-2-yl-1,3-oxazol-4-yl)methoxy]phenyl]methoxyimino]-6-phenylhexanoate

HRID 1070189Notes

Reaction equation

HRID 1070189 reaction equation
Cl[CH2:2][C:3]1[N:4]=[C:5]([C:9]2[S:10][CH:11]=[CH:12][CH:13]=2)[O:6][C:7]=1[CH3:8].[OH:14][C:15]1[CH:39]=[CH:38][C:18]([CH2:19][O:20]/[N:21]=[C:22](/[C:32]2[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=2)\[CH2:23][CH2:24][CH2:25][CH2:26][C:27]([O:29][CH2:30][CH3:31])=[O:28])=[CH:17][CH:16]=1.C(=O)([O-])[O-].[K+].[K+].CN(C)C=O>C(OCC)(=O)C.CCCCCC.O>[CH3:8][C:7]1[O:6][C:5]([C:9]2[S:10][CH:11]=[CH:12][CH:13]=2)=[N:4][C:3]=1[CH2:2][O:14][C:15]1[CH:16]=[CH:17][C:18]([CH2:19][O:20]/[N:21]=[C:22](/[C:32]2[CH:33]=[CH:34][CH:35]=[CH:36][CH:37]=2)\[CH2:23][CH2:24][CH2:25][CH2:26][C:27]([O:29][CH2:30][CH3:31])=[O:28])=[CH:38][CH:39]=1

Participants

7

Reactant 4

HCID 6228DimethylformamideHCID 11430Potassium CarbonateHCID 50764914-(Chloromethyl)-5-methyl-2-(thiophen-2-yl)-1,3-oxazoleHCID 11089565ethyl (6E)-6-[(4-hydroxyphenyl)methoxyimino]-6-phenylhexanoate

Product 1

HCID 11827573ethyl (6E)-6-[[4-[(5-methyl-2-thiophen-2-yl-1,3-oxazol-4-yl)methoxy]phenyl]methoxyimino]-6-phenylhexanoateYield 95.2%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 21226206Ethyl acetate hexaneSolvent

Procedure

A mixture of 4-chloromethyl-5-methyl-2-(2-thienyl)oxazole (397 mg), ethyl E-6-(4-hydroxybenzyloxyimino)-6-phenylhexanoate (600 mg), potassium carbonate (467 mg) and N,N-dimethylformamide (7 ml) was stirred at room temperature for 18 hours. Water 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 subjected to silica gel chromatography to obtain ethyl E-6-[4-[5-methyl-2-(2-thienyl)-4-oxazolylmethoxy]benzyloxyimino]-6-phenylhexanoate (856 mg, yield 95%) as a colorless oil from an ethyl acetate-hexane (1:4, v/v)-eluted fraction.

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

Sources & evidence

ORD record
ord-436156b4636b4b41b2fe2e904e274ce7
Source dataset
uspto-grants-2001_06
Patent number
US06251926B1

Reaction notes

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