Efficient synthesis of novel carbocyclic nucleosides via sequential Claisen rearrangement and ring-closing metathesis
作者:Ok Hyun Ko、Joon Hee Hong
DOI:10.1016/s0040-4039(02)01384-9
日期:2002.9
branched carbocyclic nucleosides was described. The stereocontrolled synthesis of target nucleosides was successfully achieved by Johnson orthoester–Claisen rearrangement, ring-closing metathesis (RCM) starting from a simple acyclic precursor 1,3-dihydoxy acetone 1. Nucleosidic bases (adenine and cytosine) were coupled by Pd(0)-catalyzed allylic alkylation in a highly regiocontrolled manner.
描述了非常有效的合成新的4' - α- C-羟甲基支链碳环核苷的途径。约翰逊原酸酯-克莱森重排,闭环复分解(RCM)从简单的无环前体1,3-二羟基丙酮1开始,成功实现了目标核苷的立体控制合成。核苷碱基(腺嘌呤和胞嘧啶)通过Pd(0)催化的烯丙基烷基化以高度区域控制的方式偶联。