N,N,N',N'-Tetramethylethylenediamine → 5,8-dimethylindeno[2,1-b]indol-6(5H)-one

Participants

Reaction Conditions

Reaction Steps

A solution of 2.19 g (0.00991 mol) of 1-methyl-3-(4-methylphenyl)-1H-indole and 3.24 mL (0.0218 mol) of TMEDA in 30 mL of ether was treated with 13.6 mL (0.0218 mol) of 1.6M BuLi in hexane under stirring at −40° C. Then the reaction mixture was allowed to warm up to r.t. and stirred for 4 h. The reaction mixture was cooled to −60° C. and treated with 1.16 g (0.00991 mol) ethyl N,N-dimethylcarbamate in 5 mL of ether. Then the reaction mixture was allowed to warm up to r.t. and was stirred overnight. Resulting mixture was treated with 50 mL of 10% aqueous NH4Cl. The violet precipitate was separated, washed twice with water and dried. Yield 1.04 g (42%).

Provenance & Evidence