作者:Thomas Wenzel、Frank Seela
DOI:10.1002/hlca.19960790117
日期:1996.2.7
The synthesis of 6-substituted 1-deazapurine 2′-deoxyribonucleosides is described. Glycosylation of the 1-deazapurine (imidazo[4,5-b]pyridine) anions with the α-D-halogenose 5 gives stereoselectively N7- and N9- regioisomers. 1H-NMR NOE and 13C-NMR spectroscopy are used for unambiguous assignment of isomers, and 15N-NMR chemical shifts are correlated with σparaHammett constants and point charges.
描述了6-取代的1-脱氮嘌呤2'-脱氧核糖核苷的合成。1-脱氮嘌呤(咪唑并[4,5-的糖基化b与α-d-halogenose]吡啶)阴离子5给出了立体选择性Ñ 7 -和Ñ 9 -区域异构体。1个H-NMR和NOE 13 C-NMR光谱法被用于异构体的明确分配,和15的N- NMR化学位移与σ相关段哈米特常数和点电荷。