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| Title: | Hydrogen atom transfer experiments provide chemical evidence for the conformational differences between C- and O-glycosides |
Authors: | Martín, Ángeles CSIC ORCID ; Quintanal, Luis M.; Suárez, Ernesto CSIC ORCID | Issue Date: | 5-Jun-2007 | Publisher: | Elsevier | Citation: | Tetrahedron Letters 48(31): 5507-5511 (2007) | Abstract: | The regioselectivity of the hydrogen atom transfer (HAT) reaction promoted by alkoxyl radicals generated from 3-hydroxypropyl α-d-mannopyranoside derivative (O-glycoside) and 2,6-anhydro-d-glycero-d-manno-decitol derivative (C-glycoside) is studied. The O-glycoside model abstracts preferentially the hydrogen atom at C-5 (1,8-HAT) while the C-glycoside abstracts the hydrogen atom at C-1 (1,6-HAT) but no abstraction at C-5 could be detected. These results are explained by the stereoelectronic control exerted by the exo-anomeric effect in the O-glycoside. | Description: | 5 pages, 3 schemes.-- Printed version published Jul 30, 2007. Experimental procedures and analytical data for all new compounds are provided. Supplementary data (24 pages) available at: http://dx.doi.org/10.1016/j.tetlet.2007.05.166 |
Publisher version (URL): | http://dx.doi.org/10.1016/j.tetlet.2007.05.166 | URI: | http://hdl.handle.net/10261/12978 | DOI: | 10.1016/j.tetlet.2007.05.166 | ISSN: | 0040-4039 |
| Appears in Collections: | (IPNA) Artículos |
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