AUTHOR=Zhang You-Ya , Li Lin , Zhang Xiang-Zhi , Peng Jin-Bao TITLE=Brønsted acid catalyzed remote C6 functionalization of 2,3-disubstituted indoles with β,γ-unsaturated α-ketoester JOURNAL=Frontiers in Chemistry VOLUME=10 YEAR=2022 URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2022.992398 DOI=10.3389/fchem.2022.992398 ISSN=2296-2646 ABSTRACT=