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Synthesis of Functionalized Cyclopentene Derivatives from Vinyldiazo Compounds and Vinylazides through Sequential
1Departmento de Química Orgánica e Inorgánica and Instituto Universitario de Química Organometálica "Enrique Moles", Universidad de Oviedo, Julián Clavería 8, 33006-, Oviedo, Spain.
Abstract:
The reaction of vinylazides with alkenyldiazo compounds in the presence of [Cu(CH3 CN)4 ][BF4 ] provided cyclopentene derivatives with retention of the azide functionality. This process likely involves a sequence comprising: 1) decomposition of the diazo component with generation of a copper alkenylcarbene species; 2) stepwise regioselective [3+2] cycloaddition; 3) allylic azide rearrangement. This method is compatible with a broad range of substrates. We also show that the azide-containing cycloadducts can be efficiently converted into the corresponding amine and triazole derivatives.