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Reagent for non-aqueous nitrosation and diazotization reactions; cf Isopentyl nitrite, L13909, and Isobutyl nitrite, L05259.• Aromatic amines have been converted in good yields to aryl halides in the presence of the Cu(II) halide: J. Org. Chem., 42, 2426 (1977); 45, 2570 (1980).