Simple Synthesis of 2,2'-Bisindole from Indigo and Its Application for the Syntheses of Indolo[2,3-a]pyrrolo[3,4-c]carbazole-5,7-(6H)dione and -5-(6H)one Derivatives
作者:Masanori Somei、Hiroyuki Hayashi、Tohru Izumi、Shinobu Ohmoto
DOI:10.3987/com-95-7192
日期:——
Indigo was converted to 2,2'-bisindole, from which 6-substituted indolo[2,3-a]pyrrolo[3,4-c]carbazole-5,7-(6H)dione and -5-(6H)one derivatives were prepared in short steps. Bromination of 6-methylindolo[2,3-a]pyrrolo[3,4-c]carbazole5,7-(6H)dione is also reported.