HCID 19709473, compound → HCID 178450762, compound

Participants

Reaction Steps

A The reaction is carried out in a way analogous to that described in Example 16B, but from 2.3 g of tert-butyl (2RS,4SR,5RS)-1-(2-aminoacetyl)-5-(2-fluorophenyl)-4-(phenylsulphonyl)pyrrolidine-2-carboxylate, 0.9 g of N,N'-carbonyldiimidazole and 0.81 g of 5-(3-aminophenyl)tetrazole in 70 cm3 of 1,2-dichloroethane. After treatment, there is obtained 0.6 g of (2RS,4SR,5RS)-5-{3-[3-(2-(2-tert-butoxycarbonyl-5-(2-flurophenyl)-4-phenylsulphonyl-1-pyrrolidinyl)-2-oxoethyl)ureido]phenyl}tetrazole in the sodium salt form [Rf 0.17; eluent: methylene chloride/methanol (90/10)].

Provenance & Evidence