Electrochemical Synthesis of 1-Naphthols by Intermolecular Annulation of Alkynes with 1,3-Dicarbonyl Compounds
作者:Mu-Xue He、Zu-Yu Mo、Zi-Qiang Wang、Shi-Yan Cheng、Ren-Ren Xie、Hai-Tao Tang、Ying-Ming Pan
DOI:10.1021/acs.orglett.9b04549
日期:2020.1.17
functionalized 1-naphthols using alkynes and 1,3-dicarbonylcompounds by (4 + 2) annulation of C-centered radical. Electrolysis was conducted with Cp2Fe as redox catalyst, thereby eliminating the use of oxidants and transition-metal catalysts. The synthesized 1-naphthol compounds showed good antitumor activity in vitro, and further studies indicated that compound 3bl induced tumor cell apoptosis.
Bromide-Mediated C–H Bond Functionalization: Intermolecular Annulation of Phenylethanone Derivatives with Alkynes for the Synthesis of 1-Naphthols
作者:Tao Lu、Ya-Ting Jiang、Feng-Ping Ma、Zi-Jing Tang、Liu Kuang、Yu-Xuan Wang、Bin Wang
DOI:10.1021/acs.orglett.7b03186
日期:2017.12.1
formation of polysubstituted 1-naphthols. The usage of readily available bromine catalyst, broad substrate scope, and mild conditions make this protocol very practical. Mechanistic investigations reveal that the bromination of phenylethanone derivatives occurs to yield bromo-substituted intermediates, which react in situ with alkynes to furnish the desired 1-naphthols.
required for this reaction. The synthetic utility is demonstrated by pinacol coupling of ketyl radicals and benzannulation of α-carbonyl radicals with alkynes to give a series of highly substituted 1-naphthols in good to excellent yields. The readily available photocatalyst, mild reaction conditions, broad substrate scope, and high functional-group tolerance make this reaction a useful synthetic tool