Synthesis of Pyridazinones through the Copper(I)-Catalyzed Multicomponent Reaction of Aldehydes, Hydrazines, and Alkynylesters
作者:Anderson C. Mantovani、Tales A. C. Goulart、Davi F. Back、Gilson Zeni
DOI:10.1002/chem.201403873
日期:2014.9.22
The copper‐catalyzed multicomponent cyclization reaction, which combined aldehydes, hydrazines, and alkynylesters, was applied in the synthesis of pyridazinones. The reaction was regioselective and gave only six‐membered pyridazinones in the complete absence of five‐membered pyrazoles or a regioisomeric mixture. During this investigation, the use of 2‐halobenzaldehyde as the starting material, under
铜催化的多组分环化反应(结合了醛,肼和炔基酯)被用于吡啶并酮的合成。该反应是区域选择性的,在完全不存在五元吡唑或区域异构体混合物的情况下,仅产生六元哒嗪酮。在这项研究中,在相同的反应条件下,以2-卤代苯甲醛为起始原料,在依次进行迈克尔加成/ 1,2-加成/乌尔曼交叉偶联反应后,得到了6-(2-乙氧基苯基)哒嗪酮。