Stereoselective Syntheses of 1,2-trans<i>p</i>-MePh and 2-Pyridyl 1-Thioglycosides Catalyzed by Zirconium(IV) Chloride
作者:Yili Ding
DOI:10.1080/00397919908085987
日期:1999.10
1-Thioglycosides including per-O-acetyl p-MePh and 2-pyridyl 1-thioglycosides were chemically synthesized with high complete stereoselectivity by using ZrCl4 as catalyst.
A New Approach to the Synthesis of Benzothiazole, Benzoxazole, and Pyridine Nucleosides as Potential Antitumor Agents
作者:Ahmed I. Khodair、Najim A. Al-Masoudi、Jean-Pierre Gesson
DOI:10.1081/ncn-120026407
日期:2003.11
A modified nitrogen and sulfur glycosylation reaction involving benzothiazole benzoxazole and pyridine nucleoside bases with furanose and pyranose sugars are described. Conformational analysis has been studied by homo- and hetero-nuclear two-dimensional NMR methods (2D DFQ-COSY, HMQC and HMBC). The N and S sites of glycosylation were determined from the H-1, C-13 hetero-nuclear multiple-quantum coherence (HMQC) experiments. All the deprotected nucleosides were tested for their potential antitumor activity.