Divergent reactivity of allene-containing α-diazoesters using Cu and Rh catalysis
作者:Alicia M. Phelps、Nicholas S. Dolan、Nathan T. Connell、Jennifer M. Schomaker
DOI:10.1016/j.tet.2013.03.014
日期:2013.7
A versatile intramolecularreaction of allene-containing diazomalonates that exhibits excellent chemoselectivity for either allenic C–H insertion or cyclopropanation is demonstrated. The identity of the product depends on the transitionmetal catalyst that is employed for the reaction. Rh catalysts promote exclusive C–H insertion with good diastereoselectivity for the trans product, while Cu catalysis