García Fernández; Ortiz Mellet; Benito, Synlett, 1998, # 3, p. 316 - 318
作者:García Fernández、Ortiz Mellet、Benito、Fuentes
DOI:——
日期:——
Nitrogen versus sulfur acylation in sugar thioureas: regioselectivity and conformational consequences
作者:M.Isabel Garcı́a-Moreno、Juan M Benito、Carmen Ortiz Mellet、José M Garcı́a Fernández
DOI:10.1016/s0957-4166(00)00054-9
日期:2000.4
The influence of steric and electronic effects in the regioselectivity of base-catalysed acetylation reactions of sugar thioureas and the structural and conformational properties of the resulting products have been investigated. Bulky alkyl substituents favoured S-acetylation, whereas aryl substituents directed acylation at nitrogen. The conformational properties of both the S- and N-acetyl compounds are governed by the existence of a strong six-membered NH...O=C intramolecular hydrogen bond that locks the pseudoamide bonds in a rigid configurational arrangement. (C) 2000 Elsevier Science Ltd. All rights reserved.
Synthesis and Evaluation of Calystegine B<sub>2</sub> Analogues as Glycosidase Inhibitors
作者:M. Isabel García-Moreno、Juan M. Benito、Carmen Ortiz Mellet、José M. García Fernández
DOI:10.1021/jo015639f
日期:2001.11.1
bicyclic aminoacetal compounds, the whole process being favored by the anomeric effect. A series of derivatives bearing different substituents at nitrogen has been prepared and screened against several glycosidases in comparison with xylonojirimycin-type piperidine analogues. Interestingly, strong and highly specific inhibition of bovine liver beta-glucosidase was observed for 6-oxacalystegine B(2) analogues