Water → (E)-3-(4-((6-methoxy-2-(4-methoxyphenyl)benzo[b]thiophen-3-yl)oxy)phenyl)acrylic acid

HRID 332876Notes

Reaction equation

HRID 332876 reaction equation
[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]2[C:10]([O:11][C:12]3[CH:17]=[CH:16][C:15](/[CH:18]=[CH:19]/[C:20]([O:22]C)=[O:21])=[CH:14][CH:13]=3)=[C:9]([C:24]3[CH:29]=[CH:28][C:27]([O:30][CH3:31])=[CH:26][CH:25]=3)[S:8][C:7]=2[CH:32]=1.C1COCC1.O.[Li+].[OH-]>C(Cl)Cl.CO>[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]2[C:10]([O:11][C:12]3[CH:17]=[CH:16][C:15](/[CH:18]=[CH:19]/[C:20]([OH:22])=[O:21])=[CH:14][CH:13]=3)=[C:9]([C:24]3[CH:25]=[CH:26][C:27]([O:30][CH3:31])=[CH:28][CH:29]=3)[S:8][C:7]=2[CH:32]=1

Participants

7

Reactant 4

HCID 962WaterHCID 3939Lithium HydroxideHCID 8028TetrahydrofuranHCID 86730659(E)-methyl 3-(4-((6-methoxy-2-(4-methoxyphenyl)benzo[b]thiophen-3-yl)oxy)phenyl)acrylate

Product 1

HCID 86730661(E)-3-(4-((6-methoxy-2-(4-methoxyphenyl)benzo[b]thiophen-3-yl)oxy)phenyl)acrylic acidYield 92%

Reagents, catalysts & solvents 2

HCID 887MethanolSolvent2×HCID 6344DichloromethaneSolvent

Procedure

To a 30 mL vial containing (E)-methyl 3-(4-((6-methoxy-2-(4-methoxyphenyl)benzo[b]thiophen-3-yl)oxy)phenyl)acrylate (110 mg, 0.25 mmol) was added THF (2.00 mL), MeOH (1.00 mL), H2O (1.00 mL) and LiOH (29.5 mg, 1.23 mmol). The resulting mixture was stirred at room temperature for 60 min after which the reaction was concentrated in vacuo, diluted with water, and acidified to pH 2 with 6 M HCl causing a precipitate to form. The mixture was diluted with 20 mL DCM and 2 mL MeOH and the organic layer was collected (phase separator) and concentrated in vacuo to afford (E)-3-(4-((6-methoxy-2-(4-methoxyphenyl)benzo[b]thiophen-3-yl)oxy)phenyl)acrylic acid (98 mg, 0.23 mmol, 92% yield) as a yellow solid. 1H NMR (400 MHz, CD3OD) δ ppm=7.51-7.69 (m, 5H), 7.43 (d, J=2.02 Hz, 1H), 7.25 (d, J=9.09 Hz, 1H), 6.88-7.02 (m, 5H), 6.37 (d, J=15.66 Hz, 1H), 3.89 (s, 3H), 3.80 (s, 3H). LC/MS (m/z, MH+): 433.0.

Workup

  1. concentrationwas concentrated in vacuo
  2. additiondiluted with water
  3. customto form
  4. customthe organic layer was collected (phase separator)
  5. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-6b51ca13fc76450895c586a0ae5db0c4
Source dataset
uspto-grants-2014_11
Patent number
US08877801B2

Reaction notes

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