On the question of free radical intermediacy in cycloaddition reactions of diazocarbonyl compounds to olefins under copper(II) chelate catalysis
作者:Miguel E. Alonso、Maria I. Hernández、Matilde Gómez、Patricia Jano、Sarah Pekerar
DOI:10.1016/s0040-4020(01)96629-3
日期:1985.1
catalyzed thermal cycloaddition of ethyl diazoacetate, dimethyl diazomalonate, ethyl-2-diazo-3-oxobutyrate, and ethyl diazopyruvate, representatives of diazocarbonyl additions that yield cyclopropanes and dihydrofurans, respectively, to olefins, has been examined in terms of the possible participation of radical species in intermediary stages. To this purpose, the title diazocarbonylcompounds were exposed