Triethylamine → 3-[7,8,9,10-tetrahydro-6H-azepino[1,2-a]indol-11-yl]-3-(1-methyl-3-indolyl)furan-2,5-dione

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Reaction Steps

1.5 g of oxalyl chloride were added dropwise to an ice-cold solution of 2.0 g of 7,8,9,10-tetrahydro-6H-azepino[1,2-a]indole (J. Org. Chem. 33, 1968, 4286) in 50 ml of dichloromethane. The mixture was stirred for 2 hours. The solvent was removed in a vacuum and the residue was dissolved in dichloromethane. The solution obtained was added to a solution of 2.2 g of 1-methyl-3-indolylacetic acid and 2.73 g of triethylamine in 50 ml of dichloromethane. The mixture was stirred and then concentrated. The residue was chromatographed on silica gel with dichloromethane and there was obtained 1.0 g of 3-[7,8,9,10-tetrahydro-6H-azepino[1,2-a]indol-11-yl]-3-(1-methyl-3-indolyl)furan-2,5-dione of melting point 257°-259° C.

Provenance & Evidence