摘要:
An efficient access to 2-isobetulin, 2-isobetulinic acid 2-isooleanolic acid, and 2-isoursolic acid has been developed The key step is a novel one-pot conversion of 2,3-dihydroxy triterpenes to 3-deoxy-2-oxo triterpenes. This method provides a new access to 3-deoxy-2-substituted pentacyclic triterpenes as potential therapeutic agents against metabolic diseases, tumors, and HIV infection.