Regioselective preferential C H activation of sterically hindered 1,3-dienes over [4+2] cycloaddition
作者:Rakesh K. Saunthwal、Kapil Mohan Saini、Monika Patel、Akhilesh K. Verma
DOI:10.1016/j.tet.2017.03.028
日期:2017.4
Pd-catalyzed preferential CH activation of sterically hindered α, β-olefinic indoles onto alkenes beyond [4 + 2] cycloaddition has been described. The carbazole derivatives were readily synthesized via activation of vinylic CH bonds with excellent regioselectivity. Further, the one-pot strategy has been employed for the synthesis of tricyclic carbazoles. The double and triple CH activation followed by concomitant
Compounds are described that are active on PPARs, including pan-active compounds. Also described are methods for developing or identifying compounds having a desired selectivity profile.
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
Pd(II)-Catalyzed CH Activation of Styrylindoles: Short, Efficient, and Regioselective Synthesis of Functionalized Carbazoles
作者:Rakesh K. Saunthwal、Monika Patel、Sonu Kumar、Abhinandan K. Danodia、Akhilesh K. Verma
DOI:10.1002/chem.201503657
日期:2015.12.14
A novel PdII‐catalyzed approach for the direct synthesis of highly functionalized carbazoles from unprotected styrylindoles has been developed. The reaction features a variety of olefin substrates, which are readily switchable by subtle tuning of the reaction conditions. Investigations of the mechanism suggest that the CHactivation proceeds via enamine formation.
Non-redox metal ion promoted oxidative coupling of indoles with olefins by the palladium(<scp>ii</scp>) acetate catalyst through dioxygen activation: experimental results with DFT calculations
作者:Sicheng Zhang、Zhuqi Chen、Shuhao Qin、Chenlin Lou、Ahmed M. Senan、Rong-Zhen Liao、Guochuan Yin
DOI:10.1039/c6ob00401f
日期:——
Pd(II)-catalyzed oxidative coupling previously. Detailed investigations revealed that the reaction proceeds by heterobimetallic Pd(II)/Sc(III)-catalyzed oxidative coupling of an indole with an olefin followed by Sc(III)-catalyzed addition with a second indole molecule. DFT calculations disclosed that the formation of heterobimetallic Pd(II)/Sc(III) species substantially decreases the C–H bond activation