Reactions of 2′,3′-Di-O-mesyl-lyxo-uridine with secondary amines: First report on the one-pot conversion of mesylated nucleosides to enaminonucleosides and the crystal structure of α-enamine.
作者:Kandasamy Sakthivel、Tanmaya Pathak、Cheravakkattu G Suresh
DOI:10.1016/s0040-4020(01)89333-9
日期:1994.1
2′,3′-Di-O-mesyl-5′-O-trityl-lyxo-uridine 1 reacted with secondary amines to produce enaminonucleosides 2a-d and 3a-d. Intermediacy of 2′-ketouridine was essential for the anomerisation and enamine formation to take place. The structure of the β-enamine was established unambiguously by analysing the hydrolysed product and that of α-enamine was proved with the help of crystal structure analysis.
2',3'-二-O-甲磺酰基5'-O-三苯甲基来苏-尿苷1与仲胺以产生enaminonucleosides反应图2a-d和3a-d中。2'-酮胍的中间性对于发生异构化和形成烯胺至关重要。通过分析水解产物可以明确地确定β-烯胺的结构,并通过晶体结构分析证明了α-烯胺的结构。