Hemming, Karl and Loukou, Christina (2004) The synthesis of bicyclic 1,2,3,4-tetrahydro-1,4-benzodiazepin-5-ones from 2-(o-nitrobenzyl)-1,2-thiazine-1-oxide precursors. Tetrahedron, 60. pp. 3349-3357. ISSN 0040-4020
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Abstract
Sulfinylation of o-nitrobenzamide and subsequent hetero Diels–Alder reaction gave a series of 2-(o-nitrobenzoyl)-1,2-thiazine-1-oxides. The 2-(o-nitrobenzoyl)-1,2-thiazine-1-oxides undergo a ring opening reaction with phenyl magnesium bromide to give allylic sulfoxides, which, after [2,3]-sigmatropic rearrangement and desulfurisation, furnish unsaturated vicinal N-(o-nitrobenzoyl)-1,2-amino alcohols. Oxidation of the alcohol and reductive ring closure gave a series of bicyclic 1,2,3,4-tetrahydro-1,4-benzodiazepin-5-ones, a subset of the ‘privileged’ 1,4-benzodiazepine structure. A 4-hydroxy-1,2,5-benzothiadiazepin-1,1-dioxide was synthesised by the same route starting from o-nitrobenzenesulfonamide.
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| Additional Information: | Copyright © 2007 Elsevier B.V. All rights reserved. ScienceDirect® is a registered trademark of Elsevier B.V. |
| Subjects: | Q Science > QD Chemistry |
| Schools: | School of Applied Sciences School of Applied Sciences > Biomolecular Sciences Research Centre |
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| Depositing User: | Briony Heyhoe |
| Date Deposited: | 13 Jul 2007 |
| Last Modified: | 15 Sep 2010 13:25 |
| URI: | http://eprints.hud.ac.uk/id/eprint/244 |
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