Please note that the structures do not display correctly in the pdf document. Therefore the original manuscript in MSWord has also been uploaded. Please contact us email if you cannot view these files. / Sonogashira cross-coupling of 2-aryl-4-chloro-3-iodoquinoline derivatives with stoichiometric amount of terminal alkynes in the presence of bis(triphenylphosphine)palladium(II)chloride and copper iodide in triethylamine afforded the 3-(alkynyl)-2-aryl-4-chloroquinoline, exclusively. On the other hand, the 2-aryl-4-chloro-3-iodoquinolines with excess (2.5 equiv.) of terminal alkynes in the presence of PdCl2(PPh3)2-CuI catalyst mixture and NEt3 in dioxane-water (3:1 v/v) afforded the 2-aryl-3,4-bis(alkynyl)quinoline derivatives in a one-step operation.
Further transformation of the 2-aryl-3-(alkynyl)-4-chloroquinoline via Suzuki cross-coupling reaction with boronic acid derivatives in the presence of tetrakis(triphenylphosphine)palladium and tricyclohexylphosphine as a ligand in dioxane-water (3:1 v/v) afforded the 2,4-diaryl-3-(alkynyl)quinolines in moderate to high yields. The 2-aryl-3-(alkynyl)-4-chloroquinolines were also transformed to the corresponding 2-aryl-4-(methylamino)-3-(alkynyl)quinoline derivatives using methylamine in ethanol under reflux. / Chemistry / M.Sc.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:unisa/oai:umkn-dsp01.int.unisa.ac.za:10500/3838 |
| Date | 06 1900 |
| Creators | Makelane, Hlamulo Reply |
| Contributors | Mphahlele, M. J. |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Dissertation |
| Format | 1 online resource (vi, 107 leaves) |
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