C(sp3)–C(sp3) bond formation via copper/Brønsted acid co-catalyzed C(sp3)–H bond oxidative cross-dehydrogenative-coupling (CDC) of azaarenes
作者:Fang-Fang Wang、Cui-Ping Luo、Guojun Deng、Luo Yang
DOI:10.1039/c4gc00038b
日期:——
A copper/Brønsted acid dual-catalyst promoted oxidative cross-dehydrogenative-coupling of alkylazaarenes and tertiary amines for C(sp3)âC(sp3) bond formation was developed. This method uses dioxygen as the terminal oxidant under mild reaction conditions and would provide a convenient benzylic CâH transformation of alkylazaarenes to biologically active pharmaceutics.
A Metal‐Free Oxidative Cross‐Dehydrogenative Coupling of
<i>N</i>
‐Aryl Tetrahydroisoquinolines and 2‐Methylazaarenes Using a Recyclable Oxoammonium Salt as Oxidant in Aqueous Media
A metal-free oxidative cross-dehydrogenative coupling of N-aryl tetrahydroisoquinolines and 2-methylazaarenes in water under mild conditions has been developed. 4-Acetylamino-2,2,6,6-tetramethylpiperidine-1-oxoammonium tetrafluoroborate was employed as a mild oxidant that can be recovered and reused directly. The reaction proceeds through formation of an iminium ion in situ followed by condensation