作者:Raisa Haavikko、Abedelmajeed Nasereddin、Nina Sacerdoti-Sierra、Dmitry Kopelyanskiy、Sami Alakurtti、Mari Tikka、Charles L. Jaffe、Jari Yli-Kauhaluoma
DOI:10.1039/c3md00282a
日期:——
The synthesis of heterocyclic betulin derivatives and their activity against Leishmania donovani is reported. Betulonic acid was used as a versatile intermediate. Several different fused heterocycles were introduced at the 2,3-position of the lupane skeleton including isoxazole, pyrazine, pyridine, indole and pyrazole rings. Also the 28-position was modified. Three compounds, 5, 8 and 25, showed low micromolar