Benzenesulfonic Acid, 2‐Nitro‐, (1‐Methylethylidene)hydrazide

[6655-27-2] C9H11N3O4S (MW 257.27) InChI = 1S/C9H11N3O4S/c1-7(2)10-11-17(15,16)9-6-4-3-5-8(9)12(13)14/h3-6,11H,1-2H3 InChIKey = SBNYNTYNEJTMQO-UHFFFAOYSA-N (a reagent used for synthesis of allenes from propargylic alcohols, for the reductive transposition of allylic alcohols and allylic bromides, and for the deoxygenation of unhindered alcohols) Alternate Names: N-isopropylidene N′-2-nitrobenzenesulfonyl hydrazine (IPNBSH), isopropylidene o-nitrobenzenesulfonylhydrazide. Physical Data: mp 139–140 °C (dec). Solubility: soluble in THF, DMSO, 1,4-dioxane, acetone, acetonitrile, and DMF; insoluble in hexanes. Form Supplied in: white solid. Preparative Method: prepared from o-nitrobenzenesulfonylhydrazide (NBSH)1 and acetone at 0 °C.2 Also commercially available from Sigma–Aldrich.3 Purification: a solution of IPNBSH in acetone is diluted with hexanes at 23 °C to induce precipitation.2, 4 Handling, Storage, and Precautions: stable at ambient temperature for several months.

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