Discrimination of Diazo Compounds Toward Carbenoids: Copper(I)-Catalyzed Synthesis of Substituted Cyclobutenes
作者:José Barluenga、Lorena Riesgo、Luis A. López、Eduardo Rubio、Miguel Tomás
DOI:10.1002/anie.200903902
日期:2009.9.28
With perfect exe‐Cu‐tion: Copper(I) catalyzes several processes in an ordered manner. First it is able to transform substrate 2 into a copper(I) furylcarbene by isomerization/cyclization, which then reacts with 1 to produce a cyclopropyldiazo derivative, which undergoes copper(I)‐catalyzed, regioselective ring enlargement to cyclobutene 3.