Methods and compositions are provided for efficiently preparing and manufacturing pentostatin. Also provided are novel precursors of pentostatin, pentostatin analogs and derivatives. In one aspect of the invention, a method is provided for total chemical synthesis of pentostatin via a route of heterocyclic ring expansion. For example, a heterocyclic pharmaceutical intermediate for drugs such as pentostatin, e.g., the diazepinone precursor, can be obtained efficiently through a ring expansion of an O—C—N functionality in a hypoxanthine or 2′-deoxyinosine derivative. The methods and compositions can also be used to synthesize and manufacture heterocyclic compounds other than pentostatin, especially pharmaceutically important heterocyclic compounds.
本发明提供了一种高效制备和生产戊糖核苷的方法和组合物。此外,还提供了戊糖核苷的新型前体、戊糖核苷类似物和衍
生物。在本发明的一个方面,提供了一种通过杂环环扩展路线对戊糖核苷进行全合成的方法。例如,可以通过对
嘌呤嘧啶或2'-去氧
肌苷衍
生物中的O-C-N官能团进行环扩展,高效地获得用于药物如戊糖核苷的杂环制药中间体,如
噻唑环酮前体。这些方法和组合物还可以用于合成和生产除戊糖核苷以外的其他
杂环化合物,特别是药物上重要的
杂环化合物。