Chlorotrimethylsilane → (E)-ethyl 3-(4-((6-methoxy-2-(4-methoxyphenyl)benzo[b]thiophen-3-yl)oxy)phenyl)-2-methylacrylate

HRID 632644Notes

Reaction equation

HRID 632644 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]=[C:19](\[CH3:25])/[C:20]([O:22][CH2:23][CH3:24])=[O:21])=[CH:14][CH:13]=3)=[C:9]([C:26]3[CH:31]=[CH:30][C:29]([O:32][CH3:33])=[CH:28][CH:27]=3)[S:8](=O)[C:7]=2[CH:35]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[Si](Cl)(C)(C)C>C1COCC1>[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]=[C:19](\[CH3:25])/[C:20]([O:22][CH2:23][CH3:24])=[O:21])=[CH:14][CH:13]=3)=[C:9]([C:26]3[CH:27]=[CH:28][C:29]([O:32][CH3:33])=[CH:30][CH:31]=3)[S:8][C:7]=2[CH:35]=1

Participants

5

Reactant 3

HCID 6397ChlorotrimethylsilaneHCID 11776TriphenylphosphineHCID 86730657(E)-ethyl 3-(4-((6-methoxy-2-(4-methoxyphenyl)-1-oxidobenzo[b]thiophen-3-yl)oxy)phenyl)-2-methylacrylate

Product 1

HCID 86730660(E)-ethyl 3-(4-((6-methoxy-2-(4-methoxyphenyl)benzo[b]thiophen-3-yl)oxy)phenyl)-2-methylacrylateYield 77%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
75 °C

Procedure

To a solution of (E)-ethyl 3-(4-((6-methoxy-2-(4-methoxyphenyl)-1-oxidobenzo[b]thiophen-3-yl)oxy)phenyl)-2-methylacrylate (144 mg, 0.294 mmol) in THF (6.0 mL) was added triphenylphosphine (285 mg, 1.086 mmol) and TMS-Cl (0.375 mL, 2.94 mmol). The reaction was heated to 75° C. for 7 h after which time the mixture was cooled to room temperature, quenched with sat. aq. NaHCO3 and extracted with EtOAc, the combined organic layers were collected (phase separator) and concentrated in vacuo to afford the crude product which was purified by column chromatography (SiO2, 0-40% EtOAc/Heptane) to afford (E)-ethyl 3-(4-((6-methoxy-2-(4-methoxyphenyl)benzo[b]thiophen-3-yl)oxy)phenyl)-2-methylacrylate (107 mg, 0.225 mmol, 77% yield). LC/MS (m/z, MH+): 475.3.

Workup

  1. temperaturewas cooled to room temperature
  2. customquenched with sat. aq. NaHCO3
  3. extractionextracted with EtOAc
  4. customthe combined organic layers were collected (phase separator)
  5. concentrationconcentrated in vacuo
  6. customto afford the crude product which
  7. customwas purified by column chromatography (SiO2, 0-40% EtOAc/Heptane)

Sources & evidence

ORD record
ord-63c97bc49a6d45dbba6137757173afba
Source dataset
uspto-grants-2016_04
Patent number
US09321746B2

Reaction notes

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