On the Regio- and Stereoselective Synthesis of Aminocyclitols from Cyclitol Epoxides: The Effect of Li as a Chelating Agent
作者:Pedro Serrano、Amadeu Llebaria、Jordi Vázquez、Joan de Pablo、Josep M. Anglada、Antonio Delgado
DOI:10.1002/chem.200401270
日期:2005.7.18
Experimental and theoretical studies on the influence of Li ions on the regio- and the stereoselectivity of the reaction of cyclitol epoxides with nitrogen nucleophiles have been carried out. Model studies with NaN3 as a nucleophile in the absence of Li ions predict a mixture of C1 and C2 regioadducts. The inclusion of two Li ions as a chelating agent favours the operation of a low populated "all-axial"
Regio- and Stereoselective Synthesis of Aminoinositols and 1,2-Diaminoinositols from Conduritol B Epoxide
作者:Pedro Serrano、Amadeu Llebaria、Antonio Delgado
DOI:10.1021/jo050521a
日期:2005.9.1
A systematic approach to the regio- and stereoselectivesynthesis of aminoinositols and 1,2-diaminoinositols arising from tetra-O-benzylconduritol B epoxide (9) and its aziridine analogue 22, respectively, is described. In all cases, the synthetic methodologies rely on the regio- and stereocontrolled azidolysis of the starting precursors to give the corresponding trans regioadducts. Subsequent functional
The <i>myo</i>-1,2-Diaminocyclitol Scaffold Defines Potent Glucocerebrosidase Activators and Promising Pharmacological Chaperones for Gaucher Disease
作者:Ana Trapero、Amadeu Llebaria
DOI:10.1021/ml200098j
日期:2011.8.11
development of pharmacologicalchaperones for enzyme deficiency in Gaucherdisease (GD). The most potent inhibitor, (1S,2R,3R,4S,5R,6S)-5,6-bis(nonylamino)cyclohexane-1,2,3,4-tetraol, displayed a K i value of 26 nM in isolated enzyme and also inhibited GCase in wild-type (wt) human fibroblasts at nanomolar concentrations. This diaminocyclitol produced maximum increases of GCase activities of 60% in N370S