Trifluoroacetic acid → 6-(5-((S)-2-amino-3-(4-(trifluoromethyl)phenyl)propylamino)-1,3,4-thiadiazol-2-yl)-1-methyl-1H-benzo[d]imidazol-2(3H)-one

HRID 2075315Notes

Reaction equation

HRID 2075315 reaction equation
[CH3:1][N:2]1[C:6]2[CH:7]=[C:8]([C:11]3[S:15][C:14]([N:16](C(OC(C)(C)C)=O)[CH2:17][C@@H:18]([NH:30]C(=O)OC(C)(C)C)[CH2:19][C:20]4[CH:25]=[CH:24][C:23]([C:26]([F:29])([F:28])[F:27])=[CH:22][CH:21]=4)=[N:13][N:12]=3)[CH:9]=[CH:10][C:5]=2[NH:4][C:3]1=[O:45].C(O)(C(F)(F)F)=O>C(Cl)Cl>[NH2:30][C@@H:18]([CH2:19][C:20]1[CH:21]=[CH:22][C:23]([C:26]([F:27])([F:28])[F:29])=[CH:24][CH:25]=1)[CH2:17][NH:16][C:14]1[S:15][C:11]([C:8]2[CH:9]=[CH:10][C:5]3[NH:4][C:3](=[O:45])[N:2]([CH3:1])[C:6]=3[CH:7]=2)=[N:12][N:13]=1

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 57991869tert-butyl (S)-1-(5-(3-methyl-2-oxo-2,3-dihydro-1H-benzo[d]imidazol-5-yl)-1,3,4-thiadiazol-2-yl-boc-amino)-3-(4-(trifluoromethyl)phenyl)propan-2-ylcarbamate

Product 1

HCID 251383706-(5-((S)-2-amino-3-(4-(trifluoromethyl)phenyl)propylamino)-1,3,4-thiadiazol-2-yl)-1-methyl-1H-benzo[d]imidazol-2(3H)-oneYield 79%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

tert-Butyl (S)-1-(5-(3-methyl-2-oxo-2,3-dihydro-1H-benzo[d]imidazol-5-yl)-1,3,4-thiadiazol-2-yl-boc-amino)-3-(4-(trifluoromethyl)phenyl)propan-2-ylcarbamate (0.36 g, 0.6 mmol) in 20 mL DCM was treated with TFA (20 mL, 260 mmol) for 30 minutes. After removing the solvent, the remaining residue was dissolved in 100 mL EtOAc. The resulting solution was washed with a mixture of aqueous saturated sodium bicarbonate and 5% 5N NaOH, and then twice with saturated sodium bicarbonate. After removing the solvent, a tan solid was obtained as the pure product 6-(5-((S)-2-amino-3-(4-(trifluoromethyl)phenyl)propylamino)-1,3,4-thiadiazol-2-yl)-1-methyl-1H-benzo[d]imidazol-2(3H)-one (0.2 g, 79% yield). LCMS (API-ES) m/z (%): 449.1 (100%, M++H); 1H NMR (400 MHz, CDCl3) δ ppm 2.72 (b, 3H), 2.97 (dd, J=13.2, 7.7 Hz, 1H) 3.27 (dd, J=13.2, 7.7 Hz, 1H) 3.36-3.46 (m, 5H) 3.56 (m, 1H) 7.03 (d, J=8.22 Hz, 1H) 7.32-7.37 (m, 3H) 7.49 (s, 1H) 7.57 (d, J=7.82 Hz, 2H).

Workup

  1. customAfter removing the solvent
  2. dissolutionthe remaining residue was dissolved in 100 mL EtOAc
  3. washThe resulting solution was washed with a mixture of aqueous saturated sodium bicarbonate and 5% 5N NaOH
  4. customAfter removing the solvent

Sources & evidence

ORD record
ord-52eef6887a8e4ecc880829165a50c011
Source dataset
uspto-grants-2011_04
Patent number
US07919504B2

Reaction notes

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