Hydrochloric Acid → 3-{[4-(4-Acetyl-3-hydroxy-2-methyl-phenoxymethyl)-phenyl]-fluoro-methyl}-benzoic acid

HRID 1161067Notes

Reaction equation

HRID 1161067 reaction equation
[C:1]([C:4]1[CH:28]=[CH:27][C:7]([O:8][CH2:9][C:10]2[CH:15]=[CH:14][C:13]([CH:16](O)[C:17]3[CH:18]=[C:19]([CH:23]=[CH:24][CH:25]=3)[C:20]([OH:22])=[O:21])=[CH:12][CH:11]=2)=[C:6]([CH3:29])[C:5]=1[OH:30])(=[O:3])[CH3:2].ClCCl.CN(S(F)(F)[F:38])C.Cl>[OH-].[Na+].O1CCCC1>[C:1]([C:4]1[CH:28]=[CH:27][C:7]([O:8][CH2:9][C:10]2[CH:15]=[CH:14][C:13]([CH:16]([F:38])[C:17]3[CH:18]=[C:19]([CH:23]=[CH:24][CH:25]=3)[C:20]([OH:22])=[O:21])=[CH:12][CH:11]=2)=[C:6]([CH3:29])[C:5]=1[OH:30])(=[O:3])[CH3:2]

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 6344DichloromethaneHCID 123203Sulfur, trifluoro(N-methylmethanaminato)-2×HCID 666995643-{[4-(4-Acetyl-3-hydroxy-2-methyl-phenoxymethyl)-phenyl]-hydroxy-methyl}-benzoic acid

Product 1

HCID 578843923-{[4-(4-Acetyl-3-hydroxy-2-methyl-phenoxymethyl)-phenyl]-fluoro-methyl}-benzoic acidYield 70%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 14798Sodium HydroxideSolvent

Conditions

Temperature
-78 °C

Procedure

A suspension of 3-{[4-(4-acetyl-3-hydroxy-2-methyl-phenoxymethyl)-phenyl]-hydroxy-methyl}-benzoic acid (100 mg, 0.246 mmol) and dichloromethane (5 mL) is stirred at −78° C. Dimethylamino sulfur trifluoride (35 μL, 0.271 mmol) is added and the mixture is warmed to room temperature. An additional portion of dimethylamino sulfur trifluoride (35 μL, 0.271 mmol) is added and suspension becomes a solution. The reaction mixture is diluted with aqueous 2N sodium hydroxide (5 mL) and tetrahydrofuran (2 mL) and stirred 10 min. The pH is adjusted to 2 with aqueous 5N hydrochloric acid and extracted with ethyl acetate (2×20 mL). The combined extracts are concentrated and the resulting residue is purified via silica chromatography eluting with hexanes to 1:1 hexanes:ethyl acetate to give the title compound (70 mg, 70%) as a white solid. 1H NMR (DMSO-d6) δ 13.12 (s, 1H), 12.86 (s, 1H), 7.93-7.95 (m, 2H), 7.82 (d, 1H), 7.68 (d, 1H), 7.44-7.59 (m, 5H), 6.75-6.90 (d, 1H), 6.72 (d, 1H), 5.29 (s, 2H), 2.59 (s, 3H), 2.06 (s, 3H). LCMS M−1 407.

Workup

  1. temperaturethe mixture is warmed to room temperature
  2. stirringstirred 10 min
  3. extractionextracted with ethyl acetate (2×20 mL)
  4. concentrationThe combined extracts are concentrated
  5. customthe resulting residue is purified via silica chromatography
  6. washeluting with hexanes to 1:1 hexanes

Sources & evidence

ORD record
ord-f8d78276708b4052b83b7fb0006b078c
Source dataset
uspto-grants-2010_10
Patent number
US07816523B2

Reaction notes

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