Lithium hydroxide, monohydrate → ((1S)-5-{3-[(3-methyl-1-benzofuran-6-yl)oxy]propoxy}-2,3-dihydro-1H-inden-1-yl)acetic acid

HRID 603404Notes

Reaction equation

HRID 603404 reaction equation
[CH3:1][C:2]1[C:6]2[CH:7]=[CH:8][C:9]([O:11][CH2:12][CH2:13][CH2:14][O:15][C:16]3[CH:17]=[C:18]4[C:22](=[CH:23][CH:24]=3)[C@H:21]([CH2:25][C:26]([O:28]CC)=[O:27])[CH2:20][CH2:19]4)=[CH:10][C:5]=2[O:4][CH:3]=1.O[Li].O>C1COCC1.O>[CH3:1][C:2]1[C:6]2[CH:7]=[CH:8][C:9]([O:11][CH2:12][CH2:13][CH2:14][O:15][C:16]3[CH:17]=[C:18]4[C:22](=[CH:23][CH:24]=3)[C@H:21]([CH2:25][C:26]([OH:28])=[O:27])[CH2:20][CH2:19]4)=[CH:10][C:5]=2[O:4][CH:3]=1

Participants

5

Reactant 2

HCID 168937Lithium hydroxide, monohydrateHCID 59300536ethyl ((1S)-5-{3-[(3-methyl-1-benzofuran-6-yl)oxy]propoxy}-2,3-dihydro-1H-inden-1-yl)acetate

Product 1

HCID 24776386((1S)-5-{3-[(3-methyl-1-benzofuran-6-yl)oxy]propoxy}-2,3-dihydro-1H-inden-1-yl)acetic acidYield 22%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Conditions

Temperature
45 °C

Procedure

To a solution of ethyl ((1S)-5-{3-[(3-methyl-1-benzofuran-6-yl)oxy]propoxy}-2,3-dihydro-1H-inden-1-yl)acetate (119 mg, 0.29 mmol) (Example 64) in THF (4.2 mL) was added a solution of LiOH.H2O (15 mg, 0.35 mmol) in water (1.4 mL). The mixture was stirred for 4 h at 45° C. and then 12 h at rt. The reaction mixture was concentrated under reduced pressure, water was added, and the aqueous phase was washed with a small volume of Et2O. The pH was adjusted to below 3 with HCl (1 N aqueous solution), and the aqueous phase was extracted with excess EtOAc. The combined EtOAc extracts were dried, filtered, and concentrated under reduced pressure to give 24 mg (22%) of the title compound as a solid. 1H NMR (300 MHz, CDCl3): δ 7.44-7.22 (m, 2H), 7.08 (d, 1H), 6.98 (s, 1H), 6.89 (d, 1H), 6.80 (s, 1H), 6.72 (d, 1H), 4.32-4.04 (m, 4H), 3.63-3.44 (m, 1H), 2.98-2.76 (m, 3H), 2.58-2.37 (m, 2H), 2.37-2.14 (m, 5H), 1.88-1.70 (m, 1H); LC-MS: RT=3.53 min, (M+H)+ 381.1.

Workup

  1. custom12 h
  2. customat rt
  3. concentrationThe reaction mixture was concentrated under reduced pressure, water
  4. additionwas added
  5. washthe aqueous phase was washed with a small volume of Et2O
  6. extractionthe aqueous phase was extracted with excess EtOAc
  7. dry with materialThe combined EtOAc extracts were dried
  8. filtrationfiltered
  9. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-7e01d6d592e14bf18711b75cd1ba6d94
Source dataset
uspto-grants-2011_03
Patent number
US07906653B2

Reaction notes

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