Water → HCID 86756334, compound

Participants

Reaction Steps

A solution of (S,S,S)-N-(1-[3-(N6-benzyloxycarbonyl-N2-mesyllysylamino)-2-carboxypropyl]-1-cyclopentylcarbonyl)tyrosine (see Preparation 9) (351 g) in ethyl acetate (1300 ml) was added to water (385 ml) and the two phase mixture hydrogenated at 414 kPa (60 psi) and room temperature over a 5% palladium-on-carbon catalyst (35 g) for 20 hours. The catalyst was filtered off, the aqueous phase separated and concentrated to low volume under reduced pressure. The viscous solution was poured into methanol (2.85 l) and stirred at room temperature for 18 hours during which time there was a slow precipitation of a solid. The solid was granulated at 5-10° C. for 2 hours, filtered, washed with methanol and dried to give the title compound as a white solid (178.1 g), m.p. 168-171° C. Found: C,51.37; H,7.47; N,9.06. C26H40N4O9S.χH2O (where χ=1) requires: C,51.81; H,7.02; N,9.30%.

Provenance & Evidence