Reductive Cyclization of a Functionalized 1,1′-Bianthraquinone
作者:Dietrich Spitzner、Isabel Althön
DOI:10.1055/s-2005-871943
日期:——
Reductive cyclization of 2,2′-dimethoxymethyl-[1,1′-bianthracene]-9,9′,10,10′-tetrone with Cu powder in concentrated sulfuric acid yields helianthrone with partially reduced side chain.