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New CO₂ chemistry for fine chemical synthesis
Includes abstract.~Includes bibliographical references (leaves 89-96).
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Chemistry
2015
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| _version_ | 1867613338863665152 |
|---|---|
| access_status_str | Open Access |
| author | Msutu, Ath'enkosi |
| author2 | Hunter, Roger |
| author_browse | Hunter, Roger Msutu, Ath'enkosi |
| author_facet | Hunter, Roger Msutu, Ath'enkosi |
| author_sort | Msutu, Ath'enkosi |
| collection | Thesis |
| description | Includes abstract.~Includes bibliographical references (leaves 89-96). |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/13102 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:34:33.896Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2015 |
| publishDateRange | 2015 |
| publishDateSort | 2015 |
| publisher | Department of Chemistry |
| publisherStr | Department of Chemistry |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/13102 New CO₂ chemistry for fine chemical synthesis Msutu, Ath'enkosi Hunter, Roger Chemistry Includes abstract.~Includes bibliographical references (leaves 89-96). There is a great need in the chemical industry for developing CO2 as a C1 building block as an important step towards "green chemistry". CO2 is also attractive as a chemical feedstock because it is readily available, inexpensive, nontoxic and it can replace toxic building blocks such as phosgene and CO. Industrially, megatons of CO2 are used each year for the production of urea, inorganic carbonates, salicylic acid, and polycarbonates, yet this is still miniscule compared to the immense potential that is still yet to be harnessed in using this versatile building block. This thesis discusses how a novel methodology was developed for synthesising a benzotriazole (Bt) urea directly from CO2 in a two-step, one-pot synthesis. The procedure involves trapping CO2 with a primary or secondary amine in the presence of DBU, and reaction of the resultant carbamate salt with triphenylphosphine and chlorobenzotriazole (BtCl) to produce Bt ureas in moderate to high yields. The Bt group may serve as a leaving group in nucleophilic substitution reactions, therefore it is also shown here how the Bt urea presents itself as a precursor for an array of useful organic intermediates. These intermediates include ureas, amides, S-thiocarbamates and sulfonylureas. 2015-06-25T13:48:00Z 2015-06-25T13:48:00Z 2011 Master Thesis Masters MSc http://hdl.handle.net/11427/13102 eng application/pdf Department of Chemistry Faculty of Science University of Cape Town |
| spellingShingle | Chemistry Msutu, Ath'enkosi New CO₂ chemistry for fine chemical synthesis |
| thesis_degree_str | Master's |
| title | New CO₂ chemistry for fine chemical synthesis |
| title_full | New CO₂ chemistry for fine chemical synthesis |
| title_fullStr | New CO₂ chemistry for fine chemical synthesis |
| title_full_unstemmed | New CO₂ chemistry for fine chemical synthesis |
| title_short | New CO₂ chemistry for fine chemical synthesis |
| title_sort | new co₂ chemistry for fine chemical synthesis |
| topic | Chemistry |
| url | http://hdl.handle.net/11427/13102 |
| work_keys_str_mv | AT msutuathenkosi newco2chemistryforfinechemicalsynthesis |