K-252C → Ngic-I

Participants

Reaction Conditions

Reaction Steps

300 mg (0.96 mmole) 6,7,12,13-tetrahydro-5-oxo-5H-indolo[2.3-a]pyrrolo [3,4-c]carbazole, suspended in 20 mL acetonitrile, are mixed with 0.3 mL (4.56 mole) acrylic acid nitrile and 2 drops of 1,8-diazabicyclo[5,4,0[undec-7-ene (DBU) and stirred for 3 days at 20° C. The mixture of starting materials and product is filtered off, again mixed with the same amounts of acrylic acid nitrile, DBU and acetonitrile and stirred for a further 3 days at 20° C. After again repeating this procedure and after a further 3 days at 20° C., the 12-(2-cyanoethyl)-6,7,12, 13-tetrahydro-5-oxo-5H-indolo[2,3-a]pyrrolo[3,4-c]carbazole is filtered off in the form of beige colored crystals which decompose above 275° C.

Provenance & Evidence