1,4-Dioxene(2,3-dihydro-1,4-dioxine) in organic synthesis. Part 9. Preparation of biologically active side-chains from 17-oxosteroids

Abstract
Steroidal 17α-2,3-dihydro-1,4-dioxin-6-yl)-17β-ols of type (2), readily available from 17-oxo steroids and 2 3-dihydro-1,4-dioxine, are easily converted into 21-hydroxy-20-oxo steroids with or without a double bond at the 16(17) position as well as to the dihydroxyacetone side-chain.