A transition-metal-free process for the synthesis of 1,4-dihydroquinoline derivatives starting from simple enaminones with aldehydes via intermolecular cascade cyclization in a one-pot protocol is developed. This methodology affords a variety of products in moderate to good yields. Particularly, the use of the enaminone fragment in 1,4-dihydroquinoline derivatives 3 as a leaving group for further diverse applications with C-nucleophiles is proved to be feasible.
以简单的烯
氨酮和醛为起点,通过分子间级联环化,以一锅协议合成 1,4-二氢
喹啉衍
生物的无过渡
金属工艺被开发出来。该方法能以中等至较高的产率获得多种产品。特别是,将 1,4-二氢
喹啉衍
生物 3 中的烯
丙酮片段作为离去基团与 C-亲核物一起用于进一步的多种应用被证明是可行的。