Ethylenediamine → HCID 18476352, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 1.18 g (4.8 mmol) of ethyl (2,5-dimethylindol-3-yl)acetate and 7.5 mL of ethylenediamine was heated at 115° C. overnight. The excess ethylenediamine was removed under reduced pressure and the residue was chromatographed with 1:1 CH2Cl2-(EtOH+10% ethanolic NH3). The pure fraction of N-(2-aminoethyl)-(2,5-dimethylindol-3-yl)acetamide obtained (1.2 g) was treated with 15 mL of hexamethyldisilazine HDS) at gentle reflux (130° C.) overnight. The mixture was concentrated to dryness, dissolved in EtOH and treated with etheric HCl to acidic. Addition of ether in 3 portions induced light brown crystals. Yield: 39%; m.p. 245-7° C.; 1H NMR (DMSO-d6) d 11.02 (br. s, 1H), 9.94 (br. s, 2H), 7.23 (s, 1H ), 7.16 (d, J=8.0 Hz, 1H), 6.85 (d, J=8.0 Hz, 1H), 3.90 (s, 2H), 3.79 (s, 4H), 2.36 (s, 6H).

Provenance & Evidence