Synthesis of indeno[1,2-b]indole by flash vacuum pyrolysis of 2-phenylquinoline-3,4-dicarboxylic anhydride

Article abstract of DOI:10.1016/S0040-4039(00)74891-X

Flash vacuum pyrolysis of 2-phenylquinoline-3,4-dicarboxylic anhydride at 800°C/0.06 Torr. gave indenol[1,2-b]indole. This was reduced to form 5,10-dihydroindenol[1,2-b]indole and it added nucleophiles to give dihydroindenoindoles with the 10-substituents