No abstract

No abstract

No abstract

Supporting InformationReagents. The organic azides were synthesized as reported in the literature and typical procedures are mentioned briefly below. Triphenyl phosphine, p-Nitroaniline and disperse orange 3 (all from Aldrich) were used without any further purification.Caution: Aromatic azides are usually stable compounds under reaction conditions. But all necessary precautions including use of safety glasses, gloves and handling/performing experiments in shatter-proof fume hoods should be followed. Syntheses. Preparation of 1-Azido-4-nitrobenzene.To a cooled suspension (0 °C) of the 4-Nitro-phenylamine (5g, 36mmol) in water (40 mL) was added concentrated HCl ( 35mL). To this mixture a solution of sodium nitrite (3.08, 47mmol) in water (15 mL) was added dropwise at -10 °C. The reaction mixture was stirred for 2 h. The red colored solution was filtered and cooled to 0 °C. Sodium azide (3.14 g, 47 mmol) in water (15 mL) was added slowly. The organic azide was separated out as a bright yellow solid with