straightforward synthesis of α-keto amides by coupling primary amines with aryl dibromoethanones under oxidative amidation conditions has been developed. The α-keto amides were then subjected to heterocyclodehydration reaction under Bischler-Napieralski conditions followed by aromatization with DBU provided 1-benzoyl isoquinolines in a two-stage process. Utilizing this methodology, isoquinoline alkaloids such
已经开发出通过在氧化酰胺化条件下将伯胺与芳基二溴乙酮偶联来直接合成 α-酮酰胺。然后将 α-酮酰胺在 Bischler-Napieralski 条件下进行杂环脱水反应,然后在两阶段过程中用 DBU 芳构化提供 1-苯甲酰基异喹啉。利用这种方法,异喹啉生物碱如沙米克林酮、罂粟碱和普氏碱 A 以极好的收率合成。