Tandem Carbenoid C–H Functionalization/Conia-ene Cyclization of <i>N</i>-Propargyl Indoles Generates Pyrroloindoles under Cooperative Rh(II)/Zn(II) Catalysis
作者:Aabid H. Bhat、Sima Alavi、Huck K. Grover
DOI:10.1021/acs.orglett.9b04210
日期:2020.1.3
decomposition of diazodicarbonyl compounds in the presence of various metal catalysts has become a reliable method for the functionalization of indoles via carbenoid intermediates. Exploiting the nucleophilic reactivity of the in situ generated malonic ester product formed, we herein report a tandem C-H functionalization/Conia-ene cyclization of N-alkyne tethered indoles. This double functionalization
A stereoselective, copper-catalyzed, arene C(sp2)–H functionalization/Michael-type annulation reaction involving α-diazocarbonyl compounds has been developed. The method features low catalyst loadings, high yields, and excellent regio and stereoselectivity, in the synthesis of various heteroaromatic frameworks by employing indoles as the arene partner.