Abstract The 1,2-dibromoethane- and KI-mediated α-acyloxylation of ketones is reported in moderate to good yield without the use of transition metals and strong oxidants. Various acids are well tolerated with wide functional group compatibility. An 1,2-dibromoethane- and KI-catalysed reaction mechanism is proposed based on the results of control experiments.
Cyclic Carbo-Isosteric Depsipeptides and Peptides as a Novel Class of Peptidomimetics
作者:Stéphanie M. Guéret、Peter Meier、Hans-Jörg Roth
DOI:10.1021/ol5003797
日期:2014.3.7
A novel and highly efficientcyclization method has been developed to access a new class of cyclic carbo-isosteric depsipeptides and carbo-isosteric peptides. Our strategy requires easily accessible C-terminal methyl ketoneester or amide functionalized linear precursors as starting materials. The well-known reductive amination has then been used to afford cyclic tetra- to octa-pseudopeptides via a