EFFICIENT SYNTHESIS OF FUSED ISOTHIAZOLO C-NUCLEOSIDES. III. SYNTHESIS OF 7-SUBSTITUTED ISOTHIAZOLO[4,5-d]PYRIMIDINE C-NUCLEOSIDES<sup>*</sup>
作者:Heinrich Wamhoff、Andrea Bamberg、Pál Sohár
DOI:10.1081/ncn-100002083
日期:2001.2.28
naturally occuring oxo- or amino substituents, are important model compounds for biological or medicinal studies (2,3). We want to report on the synthesis of novel 7-substituted isothiazolo = [4,5-d]pyrimidine C-nucleosides. As we could show in previous papers (1,4), there exists a simple approach to the protected C-glycosides 4-6.
Divakar-Reese方法已成功用于通过1,2,4-三唑-1-基转化7-氧代-异噻唑并[4,5-d]嘧啶C-核苷(4a,b,5a,b,6a)中间体(7a,b,8a,b)形成各种7-取代的C-核苷15a,b,16a,b,17a,18a,19a,b,20a,b; 它们随后的脱保护提供了新型的不寻常的C-糖苷22b,23a,24a,b,25b,26b。除了天然存在的氧代或氨基取代基外,其杂环碱基还具有C-核苷,是生物或医学研究的重要模型化合物(2,3)。我们想报告新的7-取代的异噻唑啉= [4,5-d]嘧啶C-核苷的合成。正如我们在先前的论文(1,4)中所显示的,存在一种保护C-糖苷4-6的简单方法。