Method development was completed for a strategy to access a novel pyrimidine-fused heterocyclic scaffold. The key step for this synthetic route entails an intramolecular inverse electron demand hetero-Diels-Alder reaction of imines or iminiums formed in situ from allylaminopyrimidinealdehydes 3 and anilines. The reactions provided exclusively cis-configuration products 6. Products 6 were readily precipitated
完成了开发新型
嘧啶融合杂环支架的策略的方法开发。该合成途径的关键步骤需要由烯丙基
氨基嘧啶醛3和
苯胺就地形成的
亚胺或
亚胺的分子内逆电子需量异Diels-Alder反应。该反应仅提供顺式构型产物6。产物6易于以良好至优异的产率沉淀在反应溶液中。通过氧化和随后的亲核取代序列证明了苯
硫基的进一步转化。合成策略提供了一种有效的方法来访问四环
嘧啶融合的杂环文库,可以探索其潜在的药物或
生物活性。