Palladium-Catalyzed Intra- and Intermolecular C–H Arylation Using Mesylates: Synthetic Scope and Mechanistic Studies
作者:Devin M. Ferguson、Stacey R. Rudolph、Dipannita Kalyani
DOI:10.1021/cs500587b
日期:2014.7.3
This paper describes the development of Pd-catalyzed inter- and intramolecular direct arylation using mesylates. Furthermore, a sequential mesylation/arylation protocol using phenols as substrates is described. These transformations are general with respect to the electronics of the C-H substrates and allow for the synthesis of diverse heterocyclic motifs in good yields. Both arenes and heteroarenes
benzene and methanol. Decar☐ylation and solvolysis ascribable to β- and α-scission respectively are observed in case of seven and eight membered cyclic esters. Larger rings do not undergo these photoreactions thus demonstrating effect of ringsize on photoreactivity.