Intermolecular Sonogashira Coupling and Intramolecular 5-<i>Exo</i>-<i>dig</i> Cycloisomerization Cascade: A One-Pot Pathway for Accessing (3-Benzylbenzofuran-2-yl)(phenyl)methanones
作者:Dakoju Ravi Kishore、Gedu Satyanarayana
DOI:10.1021/acs.joc.2c01101
日期:2022.8.5
straightforward strategy enabling access to 2,3-disubstitutedbenzo[b]furans. The whole synthetic process proceeds via a domino intermolecular Sonogashira coupling of 2-(2-bromophenoxy)-1-phenylethan-1-ones/alkyl 2-(2-bromophenoxy)acetates/2-(2-bromophenoxy)acetonitrile/1-(2-bromophenoxy)propan-2-one with terminal acetylenes followed by an intramolecular carbanion-yne cyclization in a 5-exo-dig manner and subsequent