作者:Joseph A. Piccirilli、Tilman Krauch、Lawrence J. MacPherson、Steven A. Benner
DOI:10.1002/hlca.19910740217
日期:1991.3.13
A route for synthesizing C-nucleosides with 2,6-substituted pyridines as heterocyclic aglycones is described. Condensation of appropriately substituted lithiated pyridines with ribono-1,4-lactone derivatives yields hemiacetal 4a–g (Table 1), which can be reduced by Et3SiH and BF3·Et2O to the corresponding C-nucleoside (see Scheme 1 for 4d β-D-5). Conditions are presented that optimize the amount of
描述了用2,6-取代的吡啶作为杂环糖苷配基合成C-核苷的途径。适当取代的锂化吡啶与ribono-1,4-内酯衍生物的缩合产生半缩醛4a – g(表1),可通过Et 3 SiH和BF 3 ·Et 2 O还原为相应的C-核苷(参见方案1)对于4dβ-D- 5)。提出了优化形成的2,6-二氯吡啶衍生的β-D-异头物β-D- 5的量的条件(表3)。β-D- 5的酶解产生二氨基核苷14(方案3)。