2‐Diazo‐1‐(4‐methoxyphenyl)‐2‐nitroethanone

[1196665-69-6] C9H7N3O4 (MW 221.17) InChI = 1S/C9H7N3O4/c1-16-7-4-2-6(3-5-7)8(13)9(11-10)12(14)15/h2-5H,1H3 InChIKey = WOIHPWWKNSZJKD-UHFFFAOYSA-N (used as a carbene precursor for Rh(II)-catalyzed cyclopropanation of alkenes, leading to the corresponding α-nitro-cyclopropylketones) Alternative Name: none. Physical Data: mp 75–76 °C, yellow solid. Solubility: soluble in CH2Cl2, CHCl3, THF, DMF, and MeCN. Slightly soluble in Et2O. Insoluble in H2O. Form Supplied in: not commercially available. Purification: silica gel chromatography, using 100% CHCl3 as eluent. Handling, Storage, and Precautions: explosive compound (shock and heat sensitive). The title compound should be stored neat at −20 °C, at which it is stable for at least 12 months. It can be stored at room temperature for 1 d without decomposition.