Lithium Hydroxide → 2-((S)-6-((4-(benzyloxy)-2',6'-dimethyl-4'-(((R)-tetrahydrofuran-3-yl)oxy)biphenyl-3-yl)methoxy)-2,3-dihydrobenzofuran-3-yl)acetic acid

HRID 2280687Notes

Reaction equation

HRID 2280687 reaction equation
[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([C:15]2[C:20]([CH3:21])=[CH:19][C:18]([O:22][C@@H:23]3[CH2:27][CH2:26][O:25][CH2:24]3)=[CH:17][C:16]=2[CH3:28])=[CH:11][C:10]=1[CH2:29][O:30][C:31]1[CH:44]=[CH:43][C:34]2[C@H:35]([CH2:38][C:39]([O:41]C)=[O:40])[CH2:36][O:37][C:33]=2[CH:32]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[OH-].[Li+]>CO.O1CCCC1>[CH2:1]([O:8][C:9]1[CH:14]=[CH:13][C:12]([C:15]2[C:16]([CH3:28])=[CH:17][C:18]([O:22][C@@H:23]3[CH2:27][CH2:26][O:25][CH2:24]3)=[CH:19][C:20]=2[CH3:21])=[CH:11][C:10]=1[CH2:29][O:30][C:31]1[CH:44]=[CH:43][C:34]2[C@H:35]([CH2:38][C:39]([OH:41])=[O:40])[CH2:36][O:37][C:33]=2[CH:32]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

5

Reactant 2

HCID 3939Lithium HydroxideHCID 117699398methyl 2-((S)-6-((4-(benzyloxy)-2',6'-dimethyl-4'-(((R)-tetrahydrofuran-3-yl)oxy)biphenyl-3-yl)methoxy)-2,3-dihydrobenzofuran-3-yl)acetate

Product 1

HCID 897018032-((S)-6-((4-(benzyloxy)-2',6'-dimethyl-4'-(((R)-tetrahydrofuran-3-yl)oxy)biphenyl-3-yl)methoxy)-2,3-dihydrobenzofuran-3-yl)acetic acidYield 15.5%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 8028TetrahydrofuranSolvent

Procedure

The crude methyl 2-((S)-6-((4-(benzyloxy)-2′,6′-dimethyl-4′-(((R)-tetrahydrofuran-3-yl)oxy)biphenyl-3-yl)methoxy)-2,3-dihydrobenzofuran-3-yl)acetate 36b (1 g, 1.69 mmol) was dissolved in 50 mL of a mixed solvent of methanol and tetrahydrofuran (V/V=1:4), followed by addition of 1M aqueous lithium hydroxide solution (20 mL, 20 mmol). The reaction solution was stirred for 2 hours. The resulting solution was concentrated under reduced pressure. The residue was mixed with 150 mL of water and 30 mL of ethyl acetate, 1M hydrochloric acid was added dropwise to adjust the pH to 2˜3, and extracted with ethyl acetate (20 mL×2). The combined organic extracts were washed with saturated sodium chloride solution (30 mL), dried with anhydrous magnesium sulphate, and filtered. The filtrate was concentrated under reduced pressure to obtain the crude title compound 2-((S)-6-((4-(benzyloxy)-2′,6′-dimethyl-4′-(((R)-tetrahydrofuran-3-yl)oxy)biphenyl-3-yl)methoxy)-2,3-dihydrobenzofuran-3-yl)acetic acid 36c (152 mg) as a brown oil, which was directly used in the next step without further purification.

Workup

  1. concentrationThe resulting solution was concentrated under reduced pressure
  2. additionThe residue was mixed with 150 mL of water and 30 mL of ethyl acetate, 1M hydrochloric acid
  3. additionwas added dropwise
  4. extractionextracted with ethyl acetate (20 mL×2)
  5. washThe combined organic extracts were washed with saturated sodium chloride solution (30 mL)
  6. dry with materialdried with anhydrous magnesium sulphate
  7. filtrationfiltered
  8. concentrationThe filtrate was concentrated under reduced pressure

Sources & evidence

ORD record
ord-77968eee0a18448a9a41f3c16281142e
Source dataset
uspto-grants-2015_09
Patent number
US09139548B2

Reaction notes

Loading…