Hydrochloric Acid → 1-[(2-Ethyl-3-{5-[4-[(1-methylethyl)oxy]-3-(trifluoromethyl)phenyl]-1,3,4-thiadiazol-2-yl}phenyl)methyl]-4-piperidinecarboxylic acid

HRID 1942708Notes

Reaction equation

HRID 1942708 reaction equation
[CH2:1]([C:3]1[C:8]([C:9]2[S:10][C:11]([C:14]3[CH:19]=[CH:18][C:17]([O:20][CH:21]([CH3:23])[CH3:22])=[C:16]([C:24]([F:27])([F:26])[F:25])[CH:15]=3)=[N:12][N:13]=2)=[CH:7][CH:6]=[CH:5][C:4]=1[CH2:28][N:29]1[CH2:34][CH2:33][CH:32]([C:35]([O:37]CC)=[O:36])[CH2:31][CH2:30]1)[CH3:2].[OH-].[Na+].Cl>C(O)(C)C.O>[CH2:1]([C:3]1[C:8]([C:9]2[S:10][C:11]([C:14]3[CH:19]=[CH:18][C:17]([O:20][CH:21]([CH3:23])[CH3:22])=[C:16]([C:24]([F:27])([F:26])[F:25])[CH:15]=3)=[N:12][N:13]=2)=[CH:7][CH:6]=[CH:5][C:4]=1[CH2:28][N:29]1[CH2:30][CH2:31][CH:32]([C:35]([OH:37])=[O:36])[CH2:33][CH2:34]1)[CH3:2]

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 66981714Ethyl 1-[(2-ethyl-3-{5-[4-[(1-methylethyl)oxy]-3-(trifluoromethyl)phenyl]-1,3,4-thiadiazol-2-yl}phenyl)methyl]-4-piperidinecarboxylate

Product 1

HCID 545789131-[(2-Ethyl-3-{5-[4-[(1-methylethyl)oxy]-3-(trifluoromethyl)phenyl]-1,3,4-thiadiazol-2-yl}phenyl)methyl]-4-piperidinecarboxylic acidYield 40.5%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 3776IsopropanolSolvent

Procedure

To a solution of ethyl 1-[(2-ethyl-3-{5-[4-[(1-methylethyl)oxy]-3-(trifluoromethyl)phenyl]-1,3,4-thiadiazol-2-yl}phenyl)methyl]-4-piperidinecarboxylate (D7) (130 mg) in isopropanol (5 mL) and water (5 mL) was added sodium hydroxide (50 mg). The reaction mixture was stirred at room temperature for 1 h. The reaction mixture was neutralized with 2N HCl till pH ˜6.0. The mixture was extracted with EA/THF for 3 times. The combined organic layers were washed with brine, dried over anhydrous sodium sulfate. The dried solution was concentrated and the residue was purified by Mass Directed AutoPrep to give 1-[(2-ethyl-3-{5-[4-[(1-methylethyl)oxy]-3-(trifluoromethyl)phenyl]-1,3,4-thiadiazol-2-yl}phenyl)methyl]-4-piperidinecarboxylic acid (E1) (50 mg) as an off-white solid. δH (DMSO-d6, 400 MHz): 1.10 (3H, t), 1.33 (6H, d), 1.54 (2H, m), 1.77 (2H, m), 2.06 (2H, m), 2.22 (1H, m), 2.76 (2H, m), 2.91 (2H, m), 4.93 (1H, m), 7.34 (1H, m), 7.51 (3H, m), 8.23 (2H, m), 12.13 (1H, br s). δF (DMSO-d6, 376 MHz): −61.3. MS (ES): C27H39F3N3O3S requires 533. found 534.2 (M+H+).

Workup

  1. extractionThe mixture was extracted with EA/THF for 3 times
  2. washThe combined organic layers were washed with brine
  3. dry with materialdried over anhydrous sodium sulfate
  4. concentrationThe dried solution was concentrated
  5. customthe residue was purified by Mass Directed AutoPrep

Sources & evidence

ORD record
ord-1b1dea38ee2b423491328214fcc0cb6e
Source dataset
uspto-grants-2013_03
Patent number
US08389508B2

Reaction notes

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