Studies on imidazole derivatives and related compounds.<b>4</b>. Synthesis of<i>O</i>-glycosides of 4-carbamoylimidazolium-5-olate
作者:Y. Tarumi、Y. Takebayashi、T. Atsumi
DOI:10.1002/jhet.5570210342
日期:1984.5
midazolium-4-olate (5) with 1,2,3,5-tetra-O-acetyl-β-D-ribofuranose in the presence of stannic chloride and trimethylsilyl trifluoromethanesulfonate afforded no 5-O-glycosides but N-1 ribosylated compound (6). However, 5-O-riboside (7a) and its orthoamide derivative (8) were given by glycosylation of tri-n-butylstannyl derivative of 5 with 2,3,5-tri-O-acetyl-β-D-ribofuranosyl chloride in the presence
在氯化锡和氯化锡存在下,将1-(4-硝基苄基)-5-氨基甲酰咪唑-4-油酸酯的三甲基甲硅烷基衍生物(5)与1,2,3,5-四-O-乙酰基-β - D-呋喃呋喃糖进行核糖基化反应。三氟甲磺酸三甲基甲硅烷基酯不提供5 - O-糖苷,而是提供N-1核糖基化的化合物(6)。然而,5- ö -riboside(7A)及其orthoamide衍生物(8)通过三-糖基化给出Ñ的-butylstannyl衍生物5与2,3,5-三- ö乙酰基β- d-三氟甲磺酸银存在下的呋喃核糖基氯。该过程被成功地应用到其他糖和5- ö葡萄糖醛酸苷(11),的一种可能的代谢物1在体内,获得5-之一ö糖苷衍生物。