Radical-Mediated Synthesis of Racemic Deoxypodophyllotoxin and Related Lignans
作者:Philippe Renaud、Tanja Kolly-Kovač
DOI:10.1055/s-2005-865358
日期:——
An approach for the synthesis of lignans related to the podophyllotoxin family is reported. The key reaction is a highly diastereoselective iodoacetal cyclization under iodine atom transfer conditions followed by a homolytic aromatic substitution. The second aromatic ring is introduced at a laterstage via addition of aryllithium to an aryl ketone. A novel and very mild method for the deoxygenation