Hydrazine hydrate (1:1) → HCID 20439474, compound

Participants

Reaction Steps

2-Chloro-5-nitrobenzenesulphonamide (3.35 g, 14.2 mmole) was dissolved in ethanol (75 ml) with heating and hydrazine hydrate (5 ml. 100 mmole) added. The mixture was refluxed for 45 minutes and then allowed to cool to room temperature. The product cystallised in long needles, 2.4 g. A second crop was obtained on cooling the filtrate in an ice bath, 0.5 g. The combined crops were recrystallised from water (120 ml) to afford pure 2-hydrazino-5-nitrobenzenesulphonamide, m.p. 209°-210° C., 1.85 gm, 60% as orange-yellow needles. TLC analysis (EtOAc:petrol, 1:1) showed one spot (Rf =0.3). Spectroscopic data was consistent with the product.

Provenance & Evidence