Acetate-hydrochloric acid → HCID 131719313, compound

Participants

Reaction Steps

Boc-Asn-Cys(Acm)-Pro-OH (XIII) is obtained by deblocking XII in HCl/HOAc att room temperature, dissolving the thus obtained raw H-Cys(Acm)-Pro-OH.HCl in DMF and neutralizing it with Et3N, and adding Boc-Asn-ONp (Novabiochem, Laufelingen, CH) at -5° C. while keeping pH neutral. XIII is isolated in 81% yield. [α]D20 =-77.1° (1 g/100 ml DMF). The tetrapeptide derivative X is prepared from XIII and Boc-Gln-ONp (Novabiochem, Laufelingen, CH) in a way corresponding to the preparation of XIII from XII and Boc-Asn-ONp. Yield 78.5%; [α]D20 =-89.7° (1 g/100 ml H2O).

Provenance & Evidence