Reactive Intermediates from DMDO Oxidation of Ynamides. Trapping of a de novo Chiral Push−Pull Carbene via Cyclopropanation
作者:Ziyad F. Al-Rashid、Richard P. Hsung
DOI:10.1021/ol703083k
日期:2008.2.1
The reaction profile of DMDO oxidations of ynamides is described. This work illustrates the first examples of highly diastereoselective intramolecular cyclopropanations of a push-pull carbene derivedfrom alkyne oxidation. In addition, the ynamide oxidation provides facile access to ketoimides and reveals mechanistic insights into the chemistry of electronically biased oxirenes.