Isothiocyanatoulosonates, a new type of glycosyl isothiocyanate useful for the stereocontrolled synthesis of thiohydantoin spironucleosides
作者:Consolación Gasch、Bader A.B Salameh、M.Angeles Pradera、José Fuentes
DOI:10.1016/s0040-4039(01)01845-7
日期:2001.12
Thiohydantoin spironucleosides and N-alkyl, aryl and glycosyl derivatives are prepared in a stereocontrolled manner, by reaction of ammonia, and of alkyl-, aryl- and glycosyl-amines with a new class of isothiocyanato sugar: the methyl 2-deoxy-2-isothiocyanatohex-2-ulofura(pyra)nosonates. The reaction produces an intermediate thioureido derivative, which spontaneously cyclates to give the spironucleoside
硫代乙内酰脲螺核苷酸和N-烷基,芳基和糖基衍生物是通过立体控制的方式,通过氨,烷基,芳基和糖基胺与一类新的异硫氰酸根合糖的反应而制备的:甲基2-脱氧-2- isothiocyanatohex-2-ulofura(pyra)nosonates。该反应产生中间体硫脲基衍生物,其自发环化以高产率得到螺核苷。或者,由2-氨基-2-脱氧-己-2--2-氟呋喃(吡喃)磺酸甲酯和烷基,芳基和糖基异硫氰酸酯制备相同的螺核苷。一些制备的化合物具有螺硫代乙内酰脲的N-核苷的结构。