2,4,6-trichloro-1,3,5-triazine in ethanol T=80°C; Fischer Indole Synthesis; 2 h;

L-(+)-tartaric acid-urea melt T=70°C; Fischer Indole Synthesis; 0.25 h;

[Ru(CO)2(4,5-bis(diphenylphosphino)-9,9-dimethyl-9H-xanthene)]2; [Ru(CO)2(4,5-bis(diphenylphosphino)-9,9-dimethyl-9H-xanthene)]2; toluene-4-sulfonic acid in 1,1-dimethylpropan-1-ol T=120°C; regioselective reaction;

dirhodium(II) tetraoctanoate in 1,2-dichloro-ethane T=70°C; 16 h; Inert atmosphereMolecular sieve;

sodium amide; sodium t-butanolate in tetrahydrofuran T=20°C; 24 h;

1: With sodium methylate in methanol T=20°C; 2 h; 2: With sulfuric acid in methanol T=90°C; Fischer cyclization; 1 h; Further stages.;

1: 1-bromocyclohexane With chloro-trimethyl-silane; magnesium; ethylene dibromide; lithium chloride; zinc dibromide in tetrahydrofuran T=0 - 25°C; 4 h; Inert atmosphere; 2: With zinc dibromide in tetrahydrofuran T=25°C; 0.166667 h; Inert atmosphere; 3: 4-methoxybenzenediazonium tetrafluoroborate With chloro-trimethyl-silane in tetrahydrofuran T=-60 - 125°C; Inert atmosphereMicrowave irradiation; regioselective reaction;

pyridine in chloroform T=90°C; 6 h; Inert atmosphere;

1,1'-bis-(diphenylphosphino)ferrocene; tri-ruthenium(0)dodecacarbonyl; toluene-4-sulfonic acid in 1,4-dioxane T=150°C; 22 h; Inert atmosphere;

toluene-4-sulfonic acid in ethanol Fischer cyclization; 1 h; Heating;