An improved synthesis of 11-oxoestrone-3-acetate-17-ethyleneketal is reported. Adjustments are proposed for the oxidation of estrone by 2,3-dichloro-5,6-dicyano-1,4-benzoquinone into 9(11)-dehydroestrone. A complete hydroboration-oxidation of the resulting ketal, by means of borane-methylsulfide complex, gives the corresponding 11-hydroxy derivative. This latter compound is then acetylated for successful oxidation with pyridinium chlorochromate on alumina. The overall yield is 30%.
Synthesis of the 11-(hydrogen succinate) and 11-(β-<scp>D</scp>-glucopyranosiduronic acid) derivative of estra-1,3,5(10)-triene-3,11α,17β-triol
作者:David N. Kirk、Christopher J. Slade
DOI:10.1039/p19840002595
日期:——
3,11α-Dihydroxyestra-1,3,5(10)-trien-17-one (11α-hydroxyestrone) has been converted into the 11α-hydroxyestradiol derivatives named in the title, for radioimmunoassay purposes.