Steriods is unique and considered as the key of life. The dissertation focuses on the sustainable utilization of the abundant steroids resources in synthesis of natural products. There are three main parts:
First, the study of synthesis of dihydropennogenin. Comparing the dihydropennogenin with tigogenin, dihydropennogenin has 17-hydroxy, while tigogenin doesn't. For utilization the untouchable skeleton of sapogenin, we started from tigogenin , through oxidation , opening of E, F ring, turning 16-...