作者:Jan Tois、Mikko Vahermo、Ari Koskinen
DOI:10.1016/j.tetlet.2004.12.046
日期:2005.1
A rapid two-step synthesis of 4(1H)quinolones is described. The first step involves condensation of o-nitroacetophenone with N,N-dimethylformamide dimethylacetal yielding highly crystalline enamines. In the second step a reductive cyclization is achieved under catalytic transfer hydrogenation (CTH) conditions. In all cases, the total time of this process was less than 3 h.
描述了一种快速的两步合成4(1 H)喹诺酮的方法。第一步涉及邻硝基苯乙酮与N,N-二甲基甲酰胺二甲基乙缩醛的缩合,生成高度结晶的烯胺。在第二步中,在催化转移氢化(CTH)条件下实现还原环化。在所有情况下,该过程的总时间少于3小时。