Synthesis and Cytotoxicity Studies of Cyclohepta[b]indoles,Benzo[6,7]Cyclohepta[1,2‐b]Indoles,Indeno[1,2‐b]Indoles,and Benzo[a]Carbazoles

Synthesis and biological evaluation of various tricyclic and tetracyclic indoles are described. A number of these compounds possess in vitro activity against human nasopharyngeal carcinoma (HONE‐1) and gastric adenocarcinoma (NUGC‐3) cell lines.     

Synthesis of 4-nitrocyclopenta[cd]pyrene

Nitration of cyclopenta[cd]pyrene in the presence of silver nitrate, sodium nitrite and iodine in acetonitrile yields 4-nitrocyclopenta[cd]pyrene.