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

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).

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

ORD record

ord-52eef6887a8e4ecc880829165a50c011

Source dataset

uspto-grants-2011_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07919504B2