作者:José Marco-Contelles、Mercedes Rodrı́guez-Fernández
DOI:10.1016/s0040-4039(99)01981-4
日期:2000.1
A new strategy has been reported for the synthesis of fused triazole-piperidinoses featuring an unprecedented 6-exo-trig free radical cyclization onto conveniently functionalized 1,2,3-triazoles contained in sugar templates. These compounds are potential key intermediates for the synthesis of azole-glycosidase inhibitors. Radical precursors have been prepared by standard methodologies from 1,2:5,6-di-O-isopropylidene-alpha-D-allofuranose The key 6-exo-trig free radical cyclizations using tris(trimethylsilyl)silane/AIBN in toluene, yielded the desired aza-annulated sugars in moderate yields. (C) 2000 Elsevier Science Ltd. All rights reserved.