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A novel, convenient and economical protocol to prepare polyfunctionalized benzo[f]indole-4,9-diones catalyzed by Mn(II) acetate from vinyl azides and 2-hydroxynaphthoquinone has been achieved. This reaction proceeded in good to excellent yields for a wide range of vinyl azides, and a possible mechanism has also been proposed.
A simple and direct synthesis of 2-aminoimidazoles from vinyl azides and cyanamide was developed. An attractive feature of this protocol is that the desired products are generated in a highly efficient and eco-friendly manner without the use of a catalyst. A plausible mechanism has been proposed.
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