Copper(I) Iodide Catalyzed
Domino Knoevenagel Hetero-Diels-Alder Reaction
of Terminal Acetylenes: Synthesis of Pyrano[2,3-<i>c</i>]pyrazoles
作者:Saeed Balalaie、Malihe Khoshkholgh、Hamid Bijanzadeh、Jürgen Gross
DOI:10.1055/s-0028-1087380
日期:——
A new and efficient CuI-catalyzed domino Knoevenagel hetero-Diels-Alderreaction of 1-oxa-1,3-butadienes with terminal unactivated acetylenesas building blocks to afford pyrano[2,3- C]pyrazoleshas been developed. The products were obtained in good to high yieldsin most cases. Synthesis of polycyclic compounds in one-pot, witheasy workup, and mild reaction conditions are advantages of ourreported method
一种新型高效的 CuI 催化 1-oxa-1,3-丁二烯与末端未活化乙炔的多米诺 Knoevenagel 异-Diels-Alder 反应作为构建单元得到吡喃并 [2,3-C] 吡唑。在大多数情况下以良好到高产率获得产物。一锅法合成多环化合物、后处理容易、反应条件温和是我们报道的方法的优点。