A novel route for the preparation of betamethasone from 9α-hydroxyandrost-4-ene-3,17-dione (9αOH-AD) by chemical synthesis and fermentation
作者:Jie Tang、Xirong Liu、Chunlin Zeng、Hao Meng、Mi Tian、Cancheng Guo
DOI:10.3184/174751917x14925986241025
日期:2017.5
A novel and efficient synthesis of betamethasone has been developed from the readily available 9α-hydroxyandrost-4-ene-3,17-dione (9αOH-AD). The 16α-methyl was introduced stereoselectively with CH3Br and converted to the 16β-methyl, the 17-side chain was installed with 2-chlorovinyl ethyl ether in the place of the toxic KCN/HOAc, and a mild fermentation was employed for the 1,2-dehydrogenation, replacing
已经从容易获得的 9α-羟基雄甾醇-4-烯-3,17-二酮 (9αOH-AD) 开发了一种新型有效的倍他米松合成方法。16α-甲基与 CH3Br 立体选择性地引入并转化为 16β-甲基,17-侧链安装有 2-氯乙烯乙醚代替有毒的 KCN/HOAc,1, 2-脱氢,取代DDQ氧化。通过对步骤的调整和改进,该路线分11步生产倍他米松,总收率22.9%,显示出其毒性和成本较低的工业应用潜力。