Second Generation API UK, Product Development, GlaxoSmithKline R&D, Gunnels Wood Road, Stevenage, Hertfordshire SG1 2NY, United Kingdom.
Steroids. 2013 Dec 11;78(12-13):1281-7. doi: 10.1016/j.steroids.2013.09.008. Epub 2013 Sep 27.
A six step transformation of prednisolone to 17α,21-dihydroxy-9β,11β-epoxy-16α-amethylpregna-1,4-diene-3,20-dione 21-acetate has been achieved in 13% unoptimised yield. Novel conditions for effecting a Mattox rearrangement and double dehydration of prednisolone were identified. Enhanced knowledge on the oxidation of silyl Δ(19,20)-enol ethers and structural factors that impact the success of the oxidation are also presented.
已实现将泼尼松龙转化为 17α,21-二羟基-9β,11β-环氧-16α-甲基孕甾-1,4-二烯-3,20-二酮 21-醋酸酯的六步转化,优化前收率为 13%。确定了实现马托克斯重排和泼尼松龙双重脱水的新条件。还介绍了关于硅烷基 Δ(19,20)-烯醇醚氧化以及影响氧化成功的结构因素的更多知识。