Trifluoroacetic acid → HCID 178521724, compound

Participants

Reaction Steps

To a solution of (1R,3S,5R)-3-[3-bromo-5-(1H-tetrazol-5-yl)-phenylcarbamoyl]-2-aza-bicyclo[3.1.0]hexane-2-carboxylic acid tert-butyl ester (200 mg, 0.445 mmol) in CH2Cl2 (2 mL) was added TFA (0.686 ml, 8.9 mmol). The reaction mixture was stirred at RT for 4 h. After completion the reaction mixture was diluted with CH2Cl2 and MeOH and the volatiles were removed under vacuum. MeOH was added and the reaction mixture concentrated again under vacuum. This operation was repeated twice to afford a mixture in a 2/3 ratio of (1R,3S,5R)-2-aza-bicyclo[3.1.0]hexane-3-carboxylic acid [3-bromo-5-(1H-tetrazol-5-yl)-phenyl]-amide: MS (LC/MS): 349.2 [M+H]+; tR (HPLC conditions k): 3.06 min and (1R,3S,5R)-2-aza-bicyclo[3.1.0]hexane-3-carboxylic acid [3-bromo-5-(1-tert-butyl-1H-tetrazol-5-yl)-phenyl]-amide: MS (LC/MS): 405.3 [M+H]+; tR (HPLC conditions k): 4.46 min.

Provenance & Evidence