A convenient route was successfully developed for the synthesis of novel heterocycles such as pyrazolo[3,4-b]pyrrolo[2,3-d]pyridines (PPP) from pyrazolo[3,4-b]pyridines in good yield. The PPP derivatives synthesized were further studied for their photophysical properties, and it was observed that absorption and emission λmax changed, owing to the substituent effect at 4 positions. These compounds were obtained from highly reactive starting materials, 5-aminopyrazoles and α-acetyl γ-butyrolactone.Key words: α-acetyl γ-butyrolactone, pyrazolo[3,4-b]pyrrolo[2,3-d] pyridine, absorption, emission, fluorescence.
研究人员成功地开发了一条简便的路线,以吡唑并[3,4-b]吡啶为原料合成新型杂环,如吡唑并[3,4-b]吡咯并[2,3-d]吡啶(PPP),收率良好。对合成的 PPP 衍生物的光物理特性进行了进一步研究,发现由于 4 个位置上取代基的影响,吸收和发射 λmax 发生了变化。关键词:α-乙酰基γ-丁内酯 吡唑并[3,4-b]吡咯并[2,3-d]吡啶 吸收 发射 荧光。