One‐Pot Synthesis of Unsymmetrical 1,3‐Butadiyne Derivatives and their Application in the Synthesis of Unsymmetrical 2,5‐Diarylthiophenes
作者:Camila B. Andrade、Diego B. Carvalho、Ozildéia S. Trefzger、Najla M. Kassab、Palimécio G. Guerrero、Sandro L. Barbosa、Cristiane Y. K. Shiguemoto、Adriano C. M. Baroni
DOI:10.1002/ejoc.201801242
日期:2019.1.31
A one‐pot, fast, and efficient protocol was developed to synthesize unsymmetrical 1,3‐diynes, consisting of a retro‐Favorskii reaction to furnish a terminal diacetylenic compound, and its coupling with organic iodide in a Sonogashira reaction under reflux in toluene for ten minutes. The described protocol was also extended to prepare 2,5‐diarylthiophenes through in situ thiocyclization of 1,3‐butadiynes
开发了一种单锅,快速,高效的方案以合成不对称的1,3-二炔,包括后Favorskii反应以提供末端的二乙炔化合物,以及该化合物与Sonodashira反应中的有机碘化物在甲苯中回流回流反应,以制得不对称的1,3-二炔。 10分钟。所描述的方案还扩展为通过原位1,3-丁二炔硫环化制备2,5-二芳基噻吩。