Thesis-1986-Ho.pdf (4.05 MB)
Some studies in nitrogen heterocyclic chemistry using Reissert compounds
thesis
posted on 2018-06-01, 09:11 authored by Yee-Ping HoThe thesis reports the first examples of Reissert compounds
prepared from five-membered ring heterocycles. The method
utilises trimethylsilyl cyanide as the key reagent in a single
phase non-aqueous medium. Previous attempts to synthesise such
compounds have failed because, under the conventional two phase
conditions, the reaction either does not proceed or ring opening
of the heterocycle occurs.
Reaction of benzothiazole with an acid chloride (aliphatic,
aromatic or chloroformate) and trimethylsilyl cyanide in dichloromethane
has been shown to give rise to 3-acyl-2-cyano-2,3-dihydrobenzothiazoles. Eight such five-membered ring
Reissert compounds have been prepared, mostly in yields exceeding
70%. The mechanistic involvement of trimethylsilyl cyanide is
discussed. The novel Reissert compounds have been shown to be
versatile intermediates for the further modification of the
starting heterocycles. [Continues.]
Funding
Science and Engineering Research Council.
History
School
- Science
Department
- Chemistry
Publisher
© Yee-Ping HoPublisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
1986Notes
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.Language
- en