2,3-二取代的苯并[ b ]呋喃很容易在很温和的反应条件下通过钯/铜催化的各种邻碘苯甲醚和末端炔的交叉偶联反应,然后用I 2,PhSeCl或p-进行亲电环化而制得。 O 2 NC 6 H 4 SCl。芳基和乙烯基取代的炔烃以优异的收率进行亲电子环化。生物学上重要的呋喃吡啶可以通过这种方法以高产率制备。
An improved procedure for the synthesis of substituted acetylenes from the reaction of acetylene gas with aryl iodides under palladium–copper catalysis
作者:Manojit Pal、Nitya G. Kundu
DOI:10.1039/p19960000449
日期:——
Dimethylformamide facilitated the palladium–copper catalysed reaction of acetylene gas with aryl iodides in a closed system to give disubstituted acetylenes in fair to excellent yields. Use of chloroform as solvent gave mixtures of mono- and di-substituted acetylenes.