Synthesis of derivatives of C-nucleoside analogues using ‘push–pull’ functionalized monosaccharides
作者:Dirk Michalik、Holger Feist、Klaus Peseke
DOI:10.1016/s0008-6215(01)00133-1
日期:2001.7
4-di-O-isopropylidene-alpha-D-galacto-heptopyranos-6-ulose (1) reacted with carbon disulphide and methyl iodide in the presence of a base to furnish 7,8-dideoxy-1,2:3,4-di-O-isopropylidene-8,8-[bis(methylthio)]-alpha-D-galacto-oct-7-enopyranos-6-ulose (2). This 'push-pull' activated unsaturated monosaccharide underwent a ring closure reaction with hydrazine hydrate to give the 'inversed' C-nucleoside analogue
在碱的存在下,将7-脱氧-1,2:3,4-二-O-异亚丙基-α-D-半乳糖-庚吡喃糖-6-ulose(1)与二硫化碳和甲基碘反应制得7,8 -二脱氧-1,2,3,4-二-O-异亚丙基-8,8- [双(甲硫基)]-α-D-半乳糖-八-七-烯吡喃-6-ulose(2)。该“推挽”活化的不饱和单糖与水合肼进行闭环反应,得到“反向” C-核苷类似物3。化合物1和丙二腈产生7-氰基-6,7-二脱氧-1,2:3 ,4-二-O-异亚丙基-6-甲基-α-D-半乳糖-八-6-烯吡喃磺腈(4)。在碱存在下用二硫化碳和甲基碘处理4得到糖``推挽式''丁二烯5,将其转化为吡啶核苷类似物6。