| Abstract
| - The preparation of polyfunctional aryl azides by the reaction of aryl triazenes with NaN3 in the presenceof KHSO4 or BF3·OEt2/TFA (trifluoroacetic acid) has been described. A variety of functional groups(halides, esters, ketones, nitriles, aldehydes, and boronic esters) are tolerated under the Lewis acidicconditions. By using this methodology, the potent antitumor agents, ellipticine and 9-methoxyellipticine,have been synthesized. In addition, isoellipticine and a related derivative, 7-carbethoxyisoellipticine, werealso prepared.
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