Sodium hydride → (E)-methyl 3-(4-((6-methoxy-2-(4-methoxyphenyl)-1-oxidobenzo[b]thiophen-3-yl)oxy)phenyl)acrylate

HRID 332871Notes

Reaction equation

HRID 332871 reaction equation
[OH:1][C:2]1[CH:7]=[CH:6][C:5](/[CH:8]=[CH:9]/[C:10]([O:12][CH3:13])=[O:11])=[CH:4][CH:3]=1.[H-].[Na+].Br[C:17]1[C:18]2[CH:34]=[CH:33][C:32]([O:35][CH3:36])=[CH:31][C:19]=2[S:20](=[O:30])[C:21]=1[C:22]1[CH:27]=[CH:26][C:25]([O:28][CH3:29])=[CH:24][CH:23]=1>CN(C=O)C>[CH3:36][O:35][C:32]1[CH:33]=[CH:34][C:18]2[C:17]([O:1][C:2]3[CH:3]=[CH:4][C:5](/[CH:8]=[CH:9]/[C:10]([O:12][CH3:13])=[O:11])=[CH:6][CH:7]=3)=[C:21]([C:22]3[CH:27]=[CH:26][C:25]([O:28][CH3:29])=[CH:24][CH:23]=3)[S:20](=[O:30])[C:19]=2[CH:31]=1

Participants

5

Reactant 3

HCID 24758Sodium hydrideHCID 5319562Methyl-P-CoumarateHCID 159594683-Bromo-6-methoxy-2-(4-methoxyphenyl)benzothiophene 1-oxide

Product 1

HCID 86730656(E)-methyl 3-(4-((6-methoxy-2-(4-methoxyphenyl)-1-oxidobenzo[b]thiophen-3-yl)oxy)phenyl)acrylateYield 97.6%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
80 °C

Procedure

To a solution of (E)-methyl 3-(4-hydroxyphenyl)acrylate (190 mg, 1.07 mmol) in DMF (5 mL) was added sodium hydride (60% suspension in oil, 42.7 mg, 1.07 mmol). The resulting mixture was allowed to stir for 10 min at room temperature after which 3-bromo-6-methoxy-2-(4-methoxyphenyl)benzo[b]thiophene 1-oxide (300 mg, 0.82 mmol) was added, as a solid. The reaction was heated to 80° C. for 18 h and upon completion was cooled to room temperature, quenched with water and diluted with DCM. The organic phase was collected (phase separator) and concentrated in vacuo to afford the crude product which was purified by column chromatography (SiO2, 0-80% EtOAc/Heptane) to afford (E)-methyl 3-(4-((6-methoxy-2-(4-methoxyphenyl)-1-oxidobenzo[b]thiophen-3-yl)oxy)phenyl)acrylate (370 mg, 0.80 mmol, 97% yield) as a yellow solid. 1H NMR (400 MHz, CDCl3) δ ppm=7.75 (d, J=9.09 Hz, 2H), 7.65 (d, J=15.66 Hz, 1H), 7.54 (d, J=2.02 Hz, 1H), 7.43-7.52 (m, J=9.09 Hz, 2H), 7.07-7.16 (m, J=8.59 Hz, 2H), 6.98-7.07 (m, 1H), 6.93 (d, J=9.09 Hz, 3H), 6.35 (d, J=16.17 Hz, 1H), 3.91 (s, 3H), 3.82 (d, J=1.52 Hz, 6H). LC/MS (m/z, MH+): 463.4.

Workup

  1. additionwas added, as a solid
  2. temperaturewas cooled to room temperature
  3. customquenched with water
  4. additiondiluted with DCM
  5. customThe organic phase was collected (phase separator)
  6. concentrationconcentrated in vacuo
  7. customto afford the crude product which
  8. customwas purified by column chromatography (SiO2, 0-80% EtOAc/Heptane)

Sources & evidence

ORD record
ord-8ee016605d51454da8df4b074b3932a7
Source dataset
uspto-grants-2014_11
Patent number
US08877801B2

Reaction notes

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