Indium(III)-Catalyzed Benzannulation of 3-Formyl-4-pyrones with Terminal Aryl Alkynes: Regioselective Synthesis of Functionalized Salicylaldehydes with <i>ortho</i>-Terphenyl Frameworks
作者:Hari Datta Khanal、Karuna Mahato、Yong Rok Lee
DOI:10.1021/acs.orglett.3c01810
日期:2023.7.28
directly provides aromatic compounds from 4-pyrones. Isotopic substitution experiments suggest that the reaction proceeds via a stepwise sequence involving the addition of an alkyne to the pyran moiety followed by cyclization, oxidation, decarboxylation, and aromatization. The synthetic utility of this protocol is demonstrated by the transformation of the obtained product into molecules with bisindole,