diastereo- and enantioselective BOX/Cu(II)-catalyzed C2,C3-cyclopentannulation of indoles with donor-acceptor cyclopropanes has been developed on the basis of asymmetric formal [3 + 2] cycloaddition of indoles. This reaction provides rapid and facile access to a series of enantioenriched cyclopenta-fused indoline products and can be further extended to the construction of tetracyclic pyrroloindolines. The synthetic
Ir-Catalyzed Chemoselective Reductive Condensation Reactions of Tertiary Amides with Active Methylene Compounds
作者:Dong-Ping Wu、Wei Ou、Pei-Qiang Huang
DOI:10.1021/acs.orglett.2c02045
日期:2022.7.29
The catalytic reductive condensation reactions of tertiary amides with activemethylene compounds leading to multifunctionalized non-N-containing products is described. The reactions proceed through sequential iridium-catalyzed hydrosilylation of the amides followed by acid-mediated condensation with the activemethylene compounds. This scalable method is broad in scope and shows remarkable chemoselectivity
Alkylated imidazopyridines are crucial structures for medicinal chemistry. Here, an efficient method for the C3–H alkylation of imidazopyridines was devised. Under Lewis acid-catalyzed conditions, reactions of imidazopyridines with different donor–acceptor cyclopropanes were carried out. Finally, 1,3-bisfunctionalizaton of donor–acceptor cyclopropanes was performed. In addition, synthesized C3-alkylated