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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Bigi, Marinus A. Reed, Sean A. White, M. Christina |
| Description | Country affiliation: United States Author Affiliation: Bigi MA ( Department of Chemistry, Roger Adams Laboratory, University of Illinois, Urbana, Illinois 61801, USA.) |
| Abstract | Carboxylate-ligated, non-haem iron enzymes demonstrate the capacity for catalysing such remarkable processes as hydroxylations, chlorinations and desaturations of inert, aliphatic C-H bonds. A key to functional diversity is the enzymes' ability to divert fleeting radicals towards different types of functionalization using active site and/or substrate modifications. We report that a non-haem iron hydroxylase catalyst [Fe(PDP)] can also be diverted to catalytic, mixed hydroxylase/desaturase activity with aliphatic C-H bonds. Using a taxane-based radical trap that rearranges under Fe(PDP) oxidation to furnish a nortaxane skeleton, we provide the first direct evidence for a substrate radical using this class of stereoretentive hydroxylation catalysts. Hydroxylation and desaturation proceed by means of a short-lived radical that diverges in a substrate-dependent manner in the presence of carboxylic acids. The novel biomimetic reactivity displayed by this small molecule catalyst is harnessed to diversify natural product derivatives as well as interrogate their biosynthetic pathways. |
| File Format | HTM / HTML |
| ISSN | 17554330 |
| Issue Number | 3 |
| Volume Number | 3 |
| e-ISSN | 17554349 |
| Journal | Nature Chemistry |
| Language | English |
| Publisher | Nature Publishing Group |
| Publisher Date | 2011-03-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Chemistry Carbon Chemistry Hydrogen Iron Biomimetic Materials Bridged Compounds Catalysis Free Radicals Hydroxylation Oxidation-reduction Oxygenases Metabolism Taxoids Journal Article Research Support, Non-u.s. Gov't Research Support, U.s. Gov't, Non-p.h.s. |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Chemical Engineering |
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