Facile synthesis of solasodine based on a mild halogenation-ring opening reaction of spiroketals in steroidal sapogenins
作者:Jing-Jing Wu、Yong Shi、Wei-Sheng Tian
DOI:10.1016/j.tetlet.2015.01.149
日期:2015.3
Herein we report a halogenation-ring opening reaction of spiroketals in steroidal sapogenins at room temperature to gain highly valuable ω-halo enol ethers in excellent yields. Boosted by this method, we have prepared solasodine, an antitumor steroidal alkaloid, from diosgenin acetate in three steps with an overall yield of 50%.