The reaction of pyranoside 2-uloses with DAST revised. Synthesis of 1-fluoro-ketofuranosyl fluorides and their reactivity with alcohols
作者:Mohamed L Aghmiz、Yolanda Dı́az、Gour Hari Jana、M.Isabel Matheu、Raouf Echarri、Sergio Castillón、M.Luisa Jimeno
DOI:10.1016/s0040-4020(01)00620-2
日期:2001.7
reaction of α-pyranosides-2-uloses 13, 14, 19 and 24 with DAST and shown that the 1,2-difluorinated compounds 17, 18 and 25 are produced by a ring-contraction reaction. The reaction of 18 with benzyl alcohol gives the tri-benzyl derivative 26 or compound 27, depending on the reaction conditions. Treating 17 with 2-naphthol produced the spiranic compounds 29–31. The reaction of 17 with bis(trimethylsilyl)uracil
我们已经再次研究α-吡喃糖苷-2- uloses的反应13,14,19和24用DAST和表明1,2-二氟化化合物17,18和25是由一个环收缩反应来制备。的反应18与苄醇给出了三苄基衍生物26或化合物27,这取决于反应条件。用2-萘酚处理17生成螺烷化合物29 – 31。的反应17与双(三甲基硅烷基)尿嘧啶中产生的mononucleoside28,其在更多取代的碳中保留氟原子。