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Trifluoroacetic acid → (4'-{1-Ethyl-1-[4-(3-hydroxy-4,4-dimethyl-pentyl)-3-methyl-phenyl]-propyl}-3-chloro-2'-methyl-biphenyl-4-yl)acetic acid methyl ester

HRID 546916
Notes
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Reaction equation

HRID 546916 reaction equation
FC(F)(F)C(O)=O.[CH3:8][O:9][C:10](=[O:53])[CH2:11][C:12]1[CH:17]=[CH:16][C:15]([C:18]2[CH:23]=[CH:22][C:21]([C:24]([C:29]3[CH:34]=[CH:33][C:32]([CH2:35][CH2:36][CH:37]([O:42][Si](C(C)(C)C)(C)C)[C:38]([CH3:41])([CH3:40])[CH3:39])=[C:31]([CH3:50])[CH:30]=3)([CH2:27][CH3:28])[CH2:25][CH3:26])=[CH:20][C:19]=2[CH3:51])=[CH:14][C:13]=1[Cl:52]>ClCCl>[CH3:8][O:9][C:10](=[O:53])[CH2:11][C:12]1[CH:17]=[CH:16][C:15]([C:18]2[CH:23]=[CH:22][C:21]([C:24]([CH2:27][CH3:28])([C:29]3[CH:34]=[CH:33][C:32]([CH2:35][CH2:36][CH:37]([OH:42])[C:38]([CH3:41])([CH3:39])[CH3:40])=[C:31]([CH3:50])[CH:30]=3)[CH2:25][CH3:26])=[CH:20][C:19]=2[CH3:51])=[CH:14][C:13]=1[Cl:52]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 57709101[4'-(1-{4-[3-(t-butyl-dimethyl-silanyloxy)-4,4-dimethyl-pentyl]-3-methyl-phenyl}-1-ethyl-propyl)-3-chloro-2'-methyl-biphenyl-4-yl]-acetic Acid Methyl Ester

Product 1

HCID 57709213(4'-{1-Ethyl-1-[4-(3-hydroxy-4,4-dimethyl-pentyl)-3-methyl-phenyl]-propyl}-3-chloro-2'-methyl-biphenyl-4-yl)acetic acid methyl esterYield 93%

Reagents, catalysts & solvents 1

HCID 6344
Dichloromethane
Solvent

Procedure

Trifluoroacetic acid (0.03 mL) was added to a solution of [4′-(1-{4-[3-(t-butyl-dimethyl-silanyloxy)-4,4-dimethyl-pentyl]-3-methyl-phenyl}-1-ethyl-propyl)-3-chloro-2′-methyl-biphenyl-4-yl]-acetic acid methyl ester (Example 61-(1); 3.0 mg, 0.045 mmol) in dichloromethane (0.15 mL) at room temperature, and the mixture was stirred at room temperature for one hour. The solvent in the reaction solution was distilled off under reduced pressure, and the residue was diluted with diethyl ether. The mixture was adjusted to pH 8 with aqueous sodium bicarbonate solution, followed by extraction with diethyl ether. The extract was dried over anhydrous magnesium sulfate and then concentrated under reduced pressure. The residue was purified by silica gel chromatography (hexane/ethyl acetate=5/1) to give the title compound (2.3 mg, 93%).

Workup

  1. distillationThe solvent in the reaction solution was distilled off under reduced pressure
  2. additionthe residue was diluted with diethyl ether
  3. extractionfollowed by extraction with diethyl ether
  4. dry with materialThe extract was dried over anhydrous magnesium sulfate
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by silica gel chromatography (hexane/ethyl acetate=5/1)

Sources & evidence

ORD record
ord-949b545b2b87460280a40a6d4a44682b
Source dataset
uspto-grants-2011_05
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07935688B2

Reaction notes

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