Sodium dicyanamide → HCID 178512364, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 7-iodo-1H-indol-5-ylamine hydrochloride IV (24.6 g, 83.7 mmol) in N,N-dimethylformamide (400 mL) at 25° C. was treated with sodium dicyanamide (18.6 g, 209 mmol). The reaction mixture was warmed to 50° C. for 2 h, concentrated in vacuo, and the residue treated with water (500 mL). The resulting mixture was allowed to stand at 25° C. for 2.5 h during which time a yellow precipitate formed. The precipitate was collected by filtration and washed with water to afford N″-cyano-N-(7-iodo-1H-indol-5-yl)guanidine V (22.59 g, 83%) as a light yellow solid: 1H NMR (DMSO-d6, 300 MHz) δ 11.02 (broad s, 1H), 8.89 (broad s, 1H), 7.46 (d, J=1.83 Hz, 1H), 7.37 (d, J=1.83 Hz, 1H), 7.35 (t, J=2.56 Hz, 1H), 6.85 (broad S, 2H), 6.56(dd, J1=1.83 Hz, J2=3.10 Hz, 1H).

Provenance & Evidence