Dimethylformamide → HCID 67550203, compound

Participants

Reaction Steps

A solution of compound 2 (200 mg, 0.372 mmole) and freshly prepared of 5-aminoindole-2-carboxylic acid ethyl ester (as described above) methyl 4-amino-1-methyl-1H-pyrrole-2-carboxylate in dry DMF (5.0 ml) was kept at ambient temperature for 48 hours and evaporated. The residue was re-precipitated from DMF (1.0 ml)-0.01 M HCl (10 ml). The precipitate was collected on the filter, washed with water (3×5 ml) end ether (2×3 ml) and dried in vacuo over phosphorus pentoxide to give 142 mg (66%) of 5-({1-[2-(2-ethoxycarbonyl-1H-indol-5-ylcarbamoyl)-1H-indol-5-yl]-methanoyl}-amino)-1H-indole-2-carboxylic acid ethyl ester 21. The structure was confirmed by ES MS and 1H-NMR.

Provenance & Evidence