The invention provides a synthetic route from sarsasapogenin to timosaponin BII a related compounds. A diketone intermediate is provided, which can advantageously used for in situ assembly of complex sugar moieties of the desired glycone end product. The diketone compound is then selectively reduced using a borohydride reducing agent form the desired end product. Certain of the end products and intermediates are novel compounds per se.
该发明提供了一种从山楂
皂素合成至地黄
皂苷BII及相关化合物的合成途径。提供了一种二酮中间体,可以优势地用于在原位组装所需糖苷末端产物的复杂糖基。然后使用
硼氢化还原剂选择性还原二酮化合物形成所需的最终产物。其中一些最终产物和中间体本身是新颖的化合物。