Heteroatom-Guided, Palladium-Catalyzed Regioselective C–H Functionalization in the Synthesis of 3-Arylquinolines
摘要:
A new approach for the regioselective functionalization of the C-3-position of quinolines is described. The method utilizes heteroatom guided regioselective C-3 palladation followed by arylation via transmetalation with aryl boronic acids to yield 3-aryl-N-acyl-1,2-dihydroquinolines. In a one-pot sequence, N-deacylation followed by aromatization leads to important 3-arylquinolines in good yields.
Carbon Atom Insertion into Pyrroles and Indoles Promoted by Chlorodiazirines
作者:Balu D. Dherange、Patrick Q. Kelly、Jordan P. Liles、Matthew S. Sigman、Mark D. Levin
DOI:10.1021/jacs.1c06287
日期:2021.8.4
calculations supporting a selectivity-determining cyclopropanation step. Computations surprisingly indicate that the stereochemistry of cyclopropanation is of little consequence to the subsequent electrocyclicringopening that forges the pyridine core, due to a compensatory homoaromatic stabilization that counterbalances orbital-controlled torquoselectivity effects. The utility of this skeletal transform is
Palladium(<scp>ii</scp>)-catalysed regioselective synthesis of 3,4-disubstituted quinolines and 2,3,5-trisubstituted pyrroles from alkenes via anti-Markovnikov selectivity
作者:Gopal Chandru Senadi、Wan-Ping Hu、Amol Milind Garkhedkar、Siva Senthil Kumar Boominathan、Jeh-Jeng Wang
DOI:10.1039/c5cc05196g
日期:——
A novel strategy has been identified for the regioselective synthesis of 3,4-disubstituted quinolines and 2,3,5-trisubstituted pyrroles through anti-Markovnikov selectivity.
Copper-Catalyzed Synthesis of Substituted Quinolines via C–N Coupling/Condensation from <i>ortho</i>-Acylanilines and Alkenyl Iodides
作者:Lingkai Kong、Yuanyuan Zhou、He Huang、Yang Yang、Yuanyuan Liu、Yanzhong Li
DOI:10.1021/jo502630t
日期:2015.1.16
An efficient cascade copper-catalyzed intermolecular Ullmann-type C–N coupling/enamine condensation reaction is described, in which ortho-acylanilines and alkenyl iodides converted to multisubstituted quinolines in good to excellent yields.
alcohols, benzaldehydes, and DMSO to quinolines has been disclosed. For the reported annulation between 2-aminobenzyl alcohols and benzaldehydes, the change of the solvent from toluene to DMSO led to the change of the product from the diheteroatomic cyclic benzoxazines to monoheteroatomic cyclic quinolines. This annulation can be used to synthesize regioselectively different substituted quinolines
Compounds of the formula:-
wherein A stands for the radical -(CH2)2- which may optionally be substituted by one or two (1-2C)alkyl radicals; Q stands for an oxygen or sulphur atom; R° stands for a (1-4C)alkyl, (1-4C)alkoxy or cyclopropyl radical; R' stands for a defined (3-4C)alkyl radical, a phenyl radical which may optionally bear a defined substituent, or a defined heteroaryl radical of 5 to 6 ring atoms; and R2 and R3 stand for hydrogen or a (1-2C)alkyl radical; and pharmaceutically-acceptable acid-addition salts thereof. Processes for the manufacture of said compounds. Pharmaceutical compositions comprising one of said compounds and a pharmaceutical diluent or cerrier. The compounds are 5-hydroxytryptamine antagonists.