反应详情

In a method to prepare 5,6,7-tri-substituted-5-deazapteridine, for example, 3-cyano-2-hydroxy-4,6-dimethylpyridine (commercially available) may be brominated with N-bromosuccinimide, affording the corresponding 5-bromo-3-cyano-2-hydroxy-4,6-dimethylpyridine: The bromo compound was in turn may be treated with phosphorus oxychloride in the presence of N,N -dimethylformamide, yielding 2-chloro-5-bromo-3-cyano-4,6-dimethylpyridine. The so-prepared pyridine was cyclized with quanidine carbonate in N,N-dimethylacetamide, yielding the targeted 5,6,7-tri-substituted-5-deazapteridine, for example, 2,4-diamino-6-bromo-5,7-dimethylformamide. Example 19 provides a detailed description of how this reaction is conducted.