作者:David C Harrowven、Benjamin J Sutton、Steven Coulton
DOI:10.1016/s0040-4039(01)00321-5
日期:2001.4
This paper is concerned with intramolecularradicaladditions to quinolines. Radicaladditions to C-2, C-3 and C-4 of a quinoline have all been shown to proceed under neutral conditions. In each case formation of heteroaromatic products, rather than dihydroquinolines, was observed (implicating the so called oxidative tin hydride pathway).
[GRAPHICS]The high level of catalyst performance was attainable in the palladium-catalyzed 1,2-addition of aryl-, heteroaryl-, and alkenylboronic acids to aromatic, heteroaromatic, and aliphatic aldehydes using thioether-imidazolinium chloride L5 as a heterobidentate carbene ligand precursor.
Synthesis and reactivity of lithium tri(quinolinyl)magnesates
2-, 3- and 4-Bromoquinolines, were converted to the corresponding lithium tri(quinolinyl)magnesates at -10degreesC when exposed to Bu3MgLi in THF. The resulting organomagnesium derivatives were quenched with various electrophiles or involved in metal-catalyzed coupling reactions with heteroaryl halides to afford functionalized quinolines. (C) 2003 Elsevier Ltd. All rights reserved.
Palladium-Catalyzed 1,2-Addition of Potassium Aryl- and Alkenyltrifluoroborates to Aldehydes using Thioether−Imidazolinium Carbene Ligands
Palladium-catalyzed 1,2-addition of potassium aryl- and alkenyltrifluoroborates to aldehydes using thioether-imidazolinium carbene ligands proceeded readily under aqueous conditions. This process tolerated a diverse range of potassium trifluoroborate salts and aldehydes, giving a variety of carbinol derivatives with good to excellent yields.
Tributylmagnesium ate complex-mediated bromine–magnesium exchange of bromoquinolines: a convenient access to functionalized quinolines
作者:S DUMOUCHEL、F MONGIN、F TRECOURT、G QUEGUINER
DOI:10.1016/s0040-4039(03)00183-7
日期:2003.3.3
2-, 3- and 4-bromoquinolines were converted to the corresponding lithium tri(quinolyl)magnesates at -10degreesC by treatment with Bu3MgLi in THF or toluene. The resulting organomagnesium derivatives were quenched by various electrophiles to afford functionalized quinolines. (C) 2003 Elsevier Science Ltd. All rights reserved.