Synthesis of 2,16α- and 4,16α-difluoroestradiols and their 11β-methoxy derivatives as potential estrogen receptor-binding radiopharmaceuticals
作者:Yann Seimbille、Hasrat Ali、Johan E. van Lier
DOI:10.1039/b110021c
日期:2002.2.22
fluorinations of intermediate bistrimethylsilyl enolethers and 16α-fluoroestrones followed by reduction of the 17-ketone and chromatographic separation of the isomeric products. The second route proceeds via electrophilic substitution of estrone or 11β-methoxyestrone with N-fluoropyridinium salt to give the 2- and 4-fluoro derivatives followed by conversion to the reactive 16β,17β-cyclic sulfates. Stereoselective