Alternative Access to 20-Hydroxyecdysteroid Side Chain by Means of Samarium Iodide-promoted Radical Addition of Tetrahydrofuran to a 20-Keto Steroid
作者:Toshio Honda、Miho Katoh
DOI:10.3987/com-97-s(n)83
日期:——
Samarium iodide-promoted radical addition of tetrahydrofuran to the 20-keto steroid afforded the adducts as a mixture of diastereomers at the 22-position in high yield. Both adducts were further converted into (20R,22R)-5 alpha-cholestane-3 beta,20,22,25-tetraol.