A Practical Synthesis of Indoles via a Pd-Catalyzed C–N Ring Formation
作者:Rishi G. Vaswani、Brian K. Albrecht、James E. Audia、Alexandre Côté、Les A. Dakin、Martin Duplessis、Victor S. Gehling、Jean-Christophe Harmange、Michael C. Hewitt、Yves Leblanc、Christopher G. Nasveschuk、Alexander M. Taylor
DOI:10.1021/ol5018118
日期:2014.8.15
A method for the synthesis of N-functionalized C2-/C3-substituted indoles via Pd-catalyzed C–N bond coupling of halo-aryl enamines is described. The general strategy utilizes a variety of amines and β-keto esters which are elaborated into halo-aryl enamines as latent precursors to indoles. The preferred conditions comprising the RuPhos precatalyst and RuPhos in the presence of NaOMe in 1,4-dioxane