Hydrochloride methanol → HCID 178490620, compound

Participants

Reaction Steps

(R)-Nω,Nω '-bis(Cbz)-N2 -(diphenylacetyl)-(R)-N-[1-(4-methoxyphenyl)ethyl]-arginine amide (5.40 g; 7.10 mmol; from step (f) above) in HOAc (300 mL) was flushed with nitrogen prior to the addition of 10% Pd/C (w/w; 1.10 g). The heterogeneous solution was briefly flushed with hydrogen and then stirred under 1 atmosphere of hydrogen for 4 hours. When the deprotection was complete, as determined by TLC analysis, the solution was filtered through a pad of Celite to remove the catalyst. The filtrate was evaporated at reduced pressure to give the crude product. The crude acetate salt was dissolved in HCl/MeOH, treated with activated carbon, filtered, concentrated, and dried under vacuum at 55-60° C. for 5 hours to give the sub-title compound as an off-white solid (3.47 g).

Provenance & Evidence