Manganese(III) acetate mediated radical reactions leading to araliopsine and related quinoline alkaloids
作者:Gregory Bar、Andrew F Parsons、C.Barry Thomas
DOI:10.1016/s0040-4020(01)00375-1
日期:2001.5
mechanism involves an initial intermolecular radical addition reaction followed by radical oxidation and cyclisation steps. Both angular and linear tricyclic alkaloids can be formed and the regioselectivity of the cyclisation is shown to depend on whether alkyl or arylgroups are attached to the alkene.
A radical approach to araliopsine and related quinoline alkaloids using manganese(III) acetate
作者:Gregory Bar、Andrew F Parsons、C.Barry Thomas
DOI:10.1016/s0040-4039(00)01324-1
日期:2000.9
Reaction of 4-hydroxy-1-methyl-2(1H)-quinolone 3 with electron-rich alkenes and manganese(III) acetate produces tricyclic quinoline alkaloids, including araliopsine 1, in one-pot reactions. This combined intermolecular addition-cyclisation reaction produces angular and/or linear tricycles and the regioselectivity of the cyclisation is shown to depend on whether alkyl or aryl substituents are attached to the alkene. (C) 2000 Elsevier Science Ltd. All rights reserved.
Palladium <scp>Iodide‐Catalyzed</scp> Selective Carbonylative Double Cyclization of 4‐(<scp>2‐Aminophenyl</scp>)‐3‐yn‐1‐ols to Dihydrofuroquinolinone Derivatives
作者:Raffaella Mancuso、Alex De Salvo、Patrizio Russo、Aurelia Falcicchio、Nicola Della Ca’、Leonardo Pantoja Munoz、Bartolo Gabriele
DOI:10.1002/cjoc.202300277
日期:2023.11
The PdI2/KI-catalyzed oxidative carbonylation of 4-(2-aminophenyl)-3-yn-1-ols, bearing two potential nucleophilic groups in suitable positionselectively leads to dihydrofuroquinolinone derivatives in fair to high yields (60%—89%) and excellent turnover numbers (180—267 mol of product per mol of Pd) over 19 examples, through a mechanistic pathway involving initial O-cyclization followed by N-cyclocarbonylation