Regioselective synthesis of 5-trifluoromethyl-1,2,3-triazole nucleoside analogues via TBS-directed 1,3-dipolar cycloaddition reaction
作者:Zhiru Xiong、Xiao-Long Qiu、Yangen Huang、Feng-Ling Qing
DOI:10.1016/j.jfluchem.2010.12.012
日期:2011.3
method for the highly regioselective synthesis of 5-trifluoromethyl-1,2,3-triazole nucleoside analogues, which featured the utilization of tert-butyldimethylsilyl (TBDMS) group as the directing group in the 1,3-dipolar cycloaddition reactions. 4-tert-Butyldimethylsilyl-5-trifluoromethyl-1,2,3-triazole nucleoside analogues were generated as the only cycloaddition products in moderate yields (15–79%)
本文描述了一种直接区域选择性合成5-三氟甲基-1,2,3-三唑核苷类似物的直接方法,其特征在于利用叔丁基二甲基甲硅烷基(TBDMS)基团作为1,3-偶极环加成中的指导基团反应。通过用3,3,3-三氟-氨基苯甲酸酯处理糖基叠氮化物,生成了4-叔丁基二甲基甲硅烷基-5-三氟甲基-1,2,3-三唑核苷类似物,作为中等收率(15–79%)的唯一环加成产物。 1-叔丁基二甲基甲硅烷基丙炔1在85°C的甲苯中。用四丁基氟化铵(TBAF)除去这些三唑环加合物中的TBS基团,可顺利获得各种5-三氟甲基-1,5-二取代的1,2,3-三唑核苷类似物(40-88%)。