tert-Butyl {2-[4-(methyl-phenyl-carbamoyl)-butylsulfanyl]-benzoimidazol-1-yl}-acetate → {2-[4-(Methyl-phenyl-carbamoyl)-butylsulfanyl]-benzoimidazol-1-yl}-acetic acid

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Reaction Steps

tert-Butyl {2-[4-(methyl-phenyl-carbamoyl)-butylsulfanyl]-benzoimidazol-1-yl}-acetate (Precursor F-01b, 25.6 mg, 0.06 mmol) is dissolved in TFA/dichloromethane (1:1, 3 ml) and stirred for 3 h at rt. Evaporation of the solvent in vacuo and drying under high vacuum yields the title compound (19.4 mg) in 87% as a yellow oil: tR=5.20 min (LC-1), ESI-MS (pos.): m/z 398.20 [M+H]+, ESI-MS (neg.): m/z 396.19 [M−H]+; 1H-NMR (DMSO-d6): δ (ppm) 1.56 (m, 4H, CH2CH2), 2.05 (m, 2H, CH2C═O), 3.14 (s, 3H, NMe), 3.22 (m, 2H, SCH2), 5.00 (s, 2H, CH2CO2), 7.18-7.32 (m, 5Harom), 7.38 (m, 2Harom), 7.53 (m, 2Harom).

Provenance & Evidence