Consecutive Three-Component Synthesis of Ynones by Decarbonylative Sonogashira Coupling
作者:Eugen Merkul、Thomas Oeser、Thomas J. J. Müller
DOI:10.1002/chem.200900119
日期:2009.5.11
7‐aza‐indoles, or pyrroles with oxalyl chloride and subsequent Pd/Cu‐catalyzed decarbonylative alkynylation with terminal alkynes furnishes alkynones under very mild conditions. 4‐(Indol‐3‐yl)‐, 4‐(7‐aza‐indol‐3‐yl)‐, and 4‐(pyrrol‐2‐yl)‐2‐amino pyrimidines can be readily obtained in a concise two‐step synthesis starting from N‐substituted indoles, 7‐aza‐indoles, or pyrroles (see scheme).