SULFUR GLYCOSYLATION REACTIONS INVOLVING 3-ALLYL-2-THIOHYDANTOIN NUCLEOSIDE BASES AS POTENTIAL ANTIVIRAL AND ANTITUMOR AGENTS
作者:Ahmed I. Khodair、Jean-Pierre Gesson
DOI:10.1080/10426509808029674
日期:1998.11.1
aromatic aldehydes 7a–f with 3-allyl-2-thiohydantoin (6), which in turn was prepared from the reaction of glycine and allyl isothiocyanate. The alkylation of 8a–f with alkyl bromides 9a, b gave 3allyl-5-(Z)-arylidene-2-(alkylmercapto)hydantoins 1a–1, S-Glycosylation and S-ribosylation took place on the reaction of 8a–f with pyranosyl bromides 11a, b and furanosyl bromide (15) under anhydrous alkaline
摘要 3-烯丙基-5-(Z)-亚芳基-2-硫代乙内酰脲 8a-f 是由芳香醛 7a-f 与 3-烯丙基-2-硫代乙内酰脲 (6) 直接缩合合成的,而后者又由甘氨酸与异硫氰酸烯丙酯反应。8a-f 与烷基溴 9a、b 的烷基化得到 3allyl-5-(Z)-亚芳基-2-(烷基巯基)乙内酰脲 1a-1,S-糖基化和 S-核糖基化发生在 8a-f 与吡喃糖基溴化物 11a、b 和呋喃糖基溴化物 (15) 在无水碱性条件下。产品选择了 S-核苷结构,而不是 N-核苷异构体的结构。该结构已从 8a 与 α-D-葡萄糖五乙酸酯 (13) 和 α-D-核糖四苯甲酸酯 (16) 在路易斯酸条件下偶联的模型研究中得到证实。