1-Acyl
triazenes can be prepared by acid-catalyzed hydration, gold/iodine-catalyzed
oxidation, or oxyhalogenation of 1-alkynyl triazenes. Crystallographic
analyses reveal a pronounced effect of the acyl group on the electronic
structure of the triazene function. 1-Acyl triazenes display high
thermal stability, and only moderate sensitivity toward hydrolysis.
They are compatible with basic and oxidative conditions, allowing
subsequent transformation. Under acidic conditions, 1-acyl triazenes
act as acylation reagents.
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