Sulfuryl chloride → (1S,5S)-(1-{5-[(3-Amino-4-fluoro-benzenesulfonyl)-isobutyl-amino]-6-hydroxy-hexylcarbamoyl}-2-naphthalen-2-yl-ethyl)-carbamic Acid tert-Butyl Ester

Participants

Reaction Steps

The title compound was prepared from the crude amine mixture of (1S)-N-(5-amino-1-hydroxymethyl-pentyl)-N-isobutyl-3-amino-4-fluoro-benzenesulfonamide which is described earlier (example 53, step C, which was made from a batch of sulfonyl chloride containing the two regioisomers) and (2S)-2-tert-butoxycarbonylamino-3-naphthalen-2-yl-propionic acid using general procedure A. The crude residue was purified by semi-preparative HPLC in several batches of 80 mg using a gradient of 35 to 90% of acetonitrile over 30 min and a flow rate of 15 mL/min, retention time=23.9 min. All the pure fractions were combined to provide 460 mg (38% yield) of the title compound.

Provenance & Evidence