Acetic Acid → 1-{2-[3-(5-{3-Chloro-4-[(1-methylethyl)oxy]phenyl}-1,3,4-thiadiazol-2-yl)-2-ethylphenyl]ethyl}-3-pyrrolidinecarboxylic acid

HRID 1942725Notes

Reaction equation

HRID 1942725 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([C:12]2[S:16][C:15]([C:17]3[C:18]([CH2:26][CH3:27])=[C:19]([CH2:23][CH:24]=O)[CH:20]=[CH:21][CH:22]=3)=[N:14][N:13]=2)[CH:5]=[CH:6][C:7]=1[O:8][CH:9]([CH3:11])[CH3:10].[NH:28]1[CH2:32][CH2:31][CH:30]([C:33]([OH:35])=[O:34])[CH2:29]1.CC(O)=O.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCl.O>[Cl:1][C:2]1[CH:3]=[C:4]([C:12]2[S:16][C:15]([C:17]3[C:18]([CH2:26][CH3:27])=[C:19]([CH2:23][CH2:24][N:28]4[CH2:32][CH2:31][CH:30]([C:33]([OH:35])=[O:34])[CH2:29]4)[CH:20]=[CH:21][CH:22]=3)=[N:14][N:13]=2)[CH:5]=[CH:6][C:7]=1[O:8][CH:9]([CH3:11])[CH3:10]

Participants

7

Reactant 4

HCID 176Acetic AcidHCID 30346453-Pyrrolidinecarboxylic acidHCID 5049666Sodium triacetoxyborohydrideHCID 58494137HCID 58494137, compound

Product 1

HCID 545793721-{2-[3-(5-{3-Chloro-4-[(1-methylethyl)oxy]phenyl}-1,3,4-thiadiazol-2-yl)-2-ethylphenyl]ethyl}-3-pyrrolidinecarboxylic acidYield 29.7%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent

Procedure

To a solution of [3-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,3,4-thiadiazol-2-yl)-2-ethylphenyl]acetaldehyde (D15) (73 mg) and 3-pyrrolidinecarboxylic acid (72.4 mg) in dichloromethane (DCM) (10 mL) stirred at room temperature was added AcOH (0.15 mL). The reaction mixture was stirred at room temperature for 10 min. Then sodium triacetoxyborohydride (66.6 mg) was added. Stirring continued for overnight. Water was added to quench the reaction, and DCM was removed by evaporation. The mixture was extracted by EA for 3 times. The combined organic solution was washed by brine, dried over anhydrous Na2SO4. The dried solution was filtered and concentrated, the residue was purified by Mass Directed AutoPrep to give 1-{2-[3-(5-{3-chloro-4-[(1-methylethyl)oxy]phenyl}-1,3,4-thiadiazol-2-yl)-2-ethylphenyl]ethyl}-3-pyrrolidinecarboxylic acid (E12) (27 mg) as a TFA salt (off-white solid). δH (DMSO-d6, 400 MHz): 1.13 (3H, t), 1.35 (6H, d), 2.23 (1H, m), 2.86 (2H, m), 3.10 (2H, m), 3.22 (2H, m), 3.48 (4H, m), 3.72 (1H, m), 3.87 (1H, m), 4.84 (1H, m), 7.39 (2H, dd), 7.50 (2H, m), 7.96 (1H, dd), 8.10 (1H, d), 9.95 (1H, br s), 12.97 (1H, br s). δF (DMSO-d6, 376 MHz): −73.5. MS (ES): C26H30ClN3O3S requires 499. found 500.1 (M+H+).

Workup

  1. stirringStirring
  2. waitcontinued for overnight
  3. customto quench
  4. customthe reaction, and DCM
  5. customwas removed by evaporation
  6. extractionThe mixture was extracted by EA for 3 times
  7. washThe combined organic solution was washed by brine
  8. dry with materialdried over anhydrous Na2SO4
  9. filtrationThe dried solution was filtered
  10. concentrationconcentrated
  11. customthe residue was purified by Mass Directed AutoPrep

Sources & evidence

ORD record
ord-29b85124771747758231f446c5e12e75
Source dataset
uspto-grants-2013_03
Patent number
US08389508B2

Reaction notes

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