作者: Zdzisław Paryzek , Roman Joachimiak , Monika Piasecka , Tomasz Pospieszny
DOI: 10.1016/J.TETLET.2012.08.151
关键词: Bile acid 、 Stereochemistry 、 Chemistry 、 Linker 、 Steroid
摘要: Abstract The reaction of 3-chlorocarbonyl derivatives bile acid esters with O,O-, N,N-, and S,S-dinucleophiles provides a general efficient entry into steroid dimers bis-carbamate, bis-carbonate, bis-monothiocarbonate moieties in the linker fragment. macrocyclization bis-carbamate 10 afforded dimeric tetrameric cholaphanes, 15 16, respectively.