Maleates from diazoacetates and dilactones from head-to-head dimerisation of alkenyl diazoacetates using Grubbs' 2nd-generation ruthenium carbene catalyst
Cyclopropanation versus carbon–hydrogen insertion. The influences of substrate and catalyst on selectivity
作者:Michael P Doyle、Iain M Phillips
DOI:10.1016/s0040-4039(01)00408-7
日期:2001.4
Reactions of diazoacetates with varying linkages from the diazo-carbon to a vinyl group, catalyzed by chiral copper(I) and rhodium(II) compounds, were examined for selectivity in their intramolecularreactions. Bis-oxazoline-ligated copper(I) has advantages for cyclopropanation that form medium-to-large rings. Dirhodium(II) carboxamidates have advantages for small-ring-fused cyclopropane compounds