Potassium Carbonate → (E)-3-(4-((6-((tert-butyldimethylsilyl)oxy)-2-(2-isopropylphenyl)benzo[b]thiophen-3-yl)oxy)phenyl)acrylic acid

HRID 632674Notes

Reaction equation

HRID 632674 reaction equation
[OH:1][C:2]1[CH:3]=[CH:4][C:5]2[C:9]([O:10][C:11]3[CH:16]=[CH:15][C:14](/[CH:17]=[CH:18]/[C:19]([OH:21])=[O:20])=[CH:13][CH:12]=3)=[C:8]([C:22]3[CH:27]=[CH:26][CH:25]=[CH:24][C:23]=3[CH:28]([CH3:30])[CH3:29])[S:7][C:6]=2[CH:31]=1.[Si:32](Cl)([C:35]([CH3:38])([CH3:37])[CH3:36])([CH3:34])[CH3:33].C(N(CC)C(C)C)(C)C.C([O-])([O-])=O.[K+].[K+]>C(Cl)Cl>[Si:32]([O:1][C:2]1[CH:3]=[CH:4][C:5]2[C:9]([O:10][C:11]3[CH:12]=[CH:13][C:14](/[CH:17]=[CH:18]/[C:19]([OH:21])=[O:20])=[CH:15][CH:16]=3)=[C:8]([C:22]3[CH:27]=[CH:26][CH:25]=[CH:24][C:23]=3[CH:28]([CH3:29])[CH3:30])[S:7][C:6]=2[CH:31]=1)([C:35]([CH3:38])([CH3:37])[CH3:36])([CH3:34])[CH3:33]

Participants

6

Reactant 4

HCID 11430Potassium CarbonateHCID 28928tert-Butyldimethylsilyl chlorideHCID 81531DiisopropylethylamineHCID 77105904(E)-3-(4-((6-hydroxy-2-(2-isopropylphenyl)benzo[b]thiophen-3-yl)oxy)phenyl)acrylic acid

Product 1

HCID 131735440(E)-3-(4-((6-((tert-butyldimethylsilyl)oxy)-2-(2-isopropylphenyl)benzo[b]thiophen-3-yl)oxy)phenyl)acrylic acidYield 95%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of (E)-3-(4-((6-hydroxy-2-(2-isopropylphenyl)benzo[b]thiophen-3-yl)oxy)phenyl)acrylic acid (100 mg, 0.232 mmol) in DCM (3 mL) at room temperature were added tert-butyldimethylsilyl chloride (88 mg, 0.581 mmol) and N,N-diisopropylethylamine (0.122 mL, 0.697 mmol). The resulting mixture was stirred at room temperature for 18 h after which time the reaction was quenched by addition of water and extracted with EtOAc (2×). The combined organic layers were dried over anhydrous Na2SO4, filtered and concentrated in vacuo and the resulting crude material was then dissolved in THF (wet) and K2CO3 (32.1 mg, 0.232 mmol) was added and the mixture was stirred at room temperature for 2 h. Upon completion the reaction was quenched by addition of 1N HCl and extracted with EtOAc (2×), the combined organic layers were washed with brine, dried over anhydrous Na2SO4, filtered and concentrated in vacuo to afford (E)-3-(4-((6-((tert-butyldimethylsilyl)oxy)-2-(2-isopropylphenyl)benzo[b]thiophen-3-yl)oxy)phenyl)acrylic acid (120 mg, 0.220 mmol, 95% yield). 1H NMR (400 MHz, CDCl3) δ ppm 7.66 (d, J=16.0 Hz, 1H), 7.37 (d, J=8.8 Hz, 2H), 7.34-7.24 (m, 5H), 7.17-7.09 (m, 1H), 6.90-6.82 (m, 3H), 6.26 (d, J=15.9 Hz, 1H), 3.24 (p, J=6.7 Hz, 1H), 1.17 (d, J=6.7 Hz, 6H), 1.01 (s, 9 H), 0.24 (s, 6H).

Workup

  1. customwas quenched by addition of water
  2. extractionextracted with EtOAc (2×)
  3. dry with materialThe combined organic layers were dried over anhydrous Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. dissolutionthe resulting crude material was then dissolved in THF (wet)
  7. stirringthe mixture was stirred at room temperature for 2 h
  8. customUpon completion the reaction was quenched by addition of 1N HCl
  9. extractionextracted with EtOAc (2×)
  10. washthe combined organic layers were washed with brine
  11. dry with materialdried over anhydrous Na2SO4
  12. filtrationfiltered
  13. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-873dd98021fb4bbe828f21d97a14be04
Source dataset
uspto-grants-2016_04
Patent number
US09321746B2

Reaction notes

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