Trifluoroacetic acid → (S)-3-amino-1-(6-bromo-2-methoxy-naphthalen-1-ylmethyl)-1,3,4,5-tetrahydro-benzo[b][1,4]diazepin-2-one trifluoroacetate

Participants

Reaction Steps

To a stirred solution of [(S)-1-(6-bromo-2-methoxy-naphthalen-1-ylmethyl)-2-oxo-2,3,4,5-tetrahydro-1H-benzo[b][1,4]diazepin-3-yl]-carbamic acid tert-butyl ester (Intermediate 4)(100 mg, 0.19 mmol) in DCM (2 mL) at 0° C. was added 50% TFA in DCM (4 mL) dropwise. After 2 h the mixture was evaporated and the residue was washed with ether to afford (S)-3-amino-1-(6-bromo-2-methoxy-naphthalen-1-ylmethyl)-1,3,4,5-tetrahydro-benzo[b][1,4]diazepin-2-one trifluoroacetate (72 mg, 70.58%). LC-MS: 426 (M+H).

Provenance & Evidence