Diazo transfer-click reaction route to new, lipophilic teicoplanin and ristocetin aglycon derivatives with high antibacterial and anti-influenza virus activity: an aggregation and receptor binding study
Pintér, Gábor × Batta, Gyula Kéki, Sándor Mándi, Attila Komáromi, István Takács-Novák, Krisztina Sztaricskai, Ferenc Röth, Erzsébet Ostorházi, Eszter Rozgonyi, Ferenc Naesens, Lieve Herczegh, Pál #
Journal of Medicinal Chemistry vol:52 issue:19 pages:6053-6061
Semisynthetic, lipophilic ristocetin and teicoplanin derivatives were prepared starting from ristocetin aglycon and teicoplanin psi-aglycon (N-acetyl-D-glucosaminyl aglycoteicoplanin). The terminal amino functions of the aglycons were converted into azido form by triflic azide. Copper catalyzed 1,3-dipolar cycloaddition reaction with lipophilic alkynes resulted in the title compounds. Two of the teicoplanin derivatives showed very good MIC and MBC values against various Gram-positive bacteria, including vanA enterococci. The aggregation and interaction of a n-decyl derivative with bacterial cell wall components was studied. One of the lipophilic ristocetin derivatives displayed favorable anti-influenza virus activity.