作者:Leo M. H. Leung、Vicky Gibson、Bruno Linclau
DOI:10.1021/jo801848h
日期:2008.12.5
A convenient synthesis of carbanucleosides, with both enantiomers equally accessible, is reported. The key step is a tandem linchpin cyclization process to give access to substituted carbafuranose derivatives having the correct relative stereochemistry for subsequent nucleobase introduction with inversion of configuration at C1. This was illustrated by the synthesis of 2',3'-dideoxycarbathymidine via
据报道,两种对映体均可以容易地合成的碳核苷的简便合成方法。关键步骤是串联linchpin环化过程,以便获得具有正确相对立体化学的取代的呋喃呋喃糖衍生物,以用于随后的核碱基引入以及C1构型的反转。通过收敛的核碱基引入合成2',3'-二脱氧羰基嘧啶,以及通过线性核碱基引入合成2',3'-二脱氧-6'-羟基尿嘧啶,说明了这一点。两种方法都依赖于光延化学,并且报道了涉及核碱基作为亲核试剂的光延反应的Mukaiyama修饰的第一个例子。