Sc(OTf)3-Catalyzed Synthesis of Indoles and SnCl4-Mediated Regioselective Hydrochlorination of 5-(Arylamino)pent-3-yn-2-ones
摘要:
Highly substituted indole derivatives bearing alkyl and aryl moieties can be prepared by Sc(OTf)(3)-catalyzed Friedel-Crafts alkenylation of 5-(arylamino)pent-3-yn-2-ones. In addition, a method for regioselective hydrochlorination of 5-(arylamino)pent-3-yn-2-ones mediated by SnCl4 in moderate to good yields (up to 84%) has been developed. The resulting exclusive Z-selectivity of the C-Cl bond can be further exploited using cross C-N coupling reactions.
Benzylic C(sp<sup>3</sup>)–C(sp<sup>2</sup>) cross-coupling of indoles enabled by oxidative radical generation and nickel catalysis
作者:Weonjeong Kim、Jangwoo Koo、Hong Geun Lee
DOI:10.1039/d0sc06666d
日期:——
effectively delivered from an aryl (pseudo)halide or an acid anhydride coupling partner, respectively. The developed method utilizes mild conditions and exhibits a wide substrate scope for both substituted indoles and C(sp2)-based reaction counterparts. Mechanisticstudies have shown that competitive hydrogen atom transfer (HAT) processes, which are frequently encountered in conventional methods, are not