Trifluoroacetic acid → 2-{2-[2-(1-Carboxy-3-methyl-butylcarbamoyl)-4-methoxy-phenyldisulfanyl]-5-methoxybenzoylamino}-4-methyl-pentanoic acid

Participants

Reaction Steps

This compound was prepared according to the procedure described in Example 50 using [S-(R*,R*)]-2-[2-[2-(1-tert-butoxycarbonyl-3-methyl- butylcarbamoyl)-4-methoxy-phenyldisulfanyl]-5-methoxybenzoylamino]-4-methyl-pentanoic acid tert-butyl ester (2.4 g, 3.4 mmol) from Example 31, 25 mL dichloromethane, 25 mL trifluoroacetic acid and 2.5 mL anisole. The crude product was recrystallized from methanol/water to afford 0.7 g of the title compound, mp 168°-169° C.

Provenance & Evidence