Fragmentation of carbohydrate anomeric alkoxyl radicals. A new synthesis of chiral 1-halo-1-iodo alditols
Gonzalez, C.C. and Kennedy, A.R. and Leon, E.I. and Riesco-Fagundo, C. and Suarez, E. (2003) Fragmentation of carbohydrate anomeric alkoxyl radicals. A new synthesis of chiral 1-halo-1-iodo alditols. Chemistry - A European Journal, 9 (23). pp. 5800-5809. ISSN 0947-6539
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Treatment of 1,2-fluorohydrins, 1,2-chlorohydrins, 1,2-bromohydrins, and 1,2-iodohydrins of the D-gluco, D-galacto, D-lacto, L-rhamno, D-allo, L-arabino, 3-deoxy-D-gluco, and 3,4-dideoxy-D-gluco families of carbohydrates with the (diacetoxyiodo)benzene/iodine system afforded 1-fluoro-1-iodo, 1-chloro-1-iodo, 1-bromo-1-iodo, and 1,1-diiodo alditols, respectively, in excellent yields. The reaction was achieved by radical fragmentation of the C1C2 bond, triggered by the initially formed anomeric alkoxy radical, and subsequent trapping of the C2-radical by iodine atoms. This methodology is compatible with the stability of the protective groups most frequently used in carbohydrate chemistry. The potential utility of these 1-halo-1-iodo alditols as chiral synthons was evaluated by their transformation into alk-1-enyl iodides and in the Takai E-olefination reaction.
| Item type: | Article |
|---|---|
| ID code: | 1016 |
| Notes: | Related item: http://strathprints.strath.ac.uk/1242/ Non-duplicate |
| Keywords: | halogen compounds, alditols, carbohydrates, iodine, radical reactions, Chemistry, Chemistry(all) |
| Subjects: | Science > Chemistry |
| Department: | Faculty of Science > Pure and Applied Chemistry Faculty of Engineering > Electronic and Electrical Engineering |
| Depositing user: | Catriona Mccallum |
| Date deposited: | 15 May 2006 |
| Last modified: | 22 Mar 2017 09:15 |
| Related URLs: | |
| URI: | https://strathprints.strath.ac.uk/id/eprint/1016 |
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