1,2-Disubstituted 4-quinolones have been prepared via copper-catalyzed heterocyclization of 1-(2-bromophenyl)- and 1-(2-chlorophenyl)-2-en-3-amin-1-ones, readily obtained from α,β-ynones and primary amines. The reaction tolerates a variety of useful functionalities including ester, keto, cyano, and chloro substituents. Quinolone derivatives can also be prepared via a sequential process from α,β-ynones and primary amines, omitting the isolation of the 1-(2-halophenyl)-2-en-3-amin-1-one intermediates.
通过
铜催化 1-(2-
溴苯基)- 和 1-(2-
氯苯基)-2-烯-3-
氨基-1-酮的杂环化反应,制备出了 1,2-二取代的 4-
喹啉酮,这些化合物很容易从δ,δ-炔酮和
伯胺中获得。该反应可容忍各种有用的官能团,包括酯、酮、
氰基和
氯取代基。
喹诺酮衍
生物也可以通过δ±,δ²-炔酮和
伯胺的连续过程制备,省去了分离 1-(2-卤代苯基)-2-烯-3-
氨基-1-酮中间体的步骤。