Synthesis and Biological Activities of Some Pyrrolopyrazoles and 2-Pyrazolines
作者:Hamed A. Ead、Hamdi M. Hassaneen、Magda A. Abdallah、Hiyam A. H. Mousa
DOI:10.1002/ardp.19913240110
日期:——
Cycloaddition reactions of the nitrilimines 4—6 with N‐arylmaleimides 7 and acrylamide (11) yield the pyrrolopyrazole derivatives 8—10 and 2‐pyrazolines 12, respectively, in excellent yield. The regioselectivity and biologicalactivities of some of the new compounds were investigated.
EAD, HAMED A.;HASSANEEN, HAMDI M.;ABDALLAH, MAGDA A.;MOUSA, HIYAM A. H., ARCH. PHARM., 324,(1991) N, C. 35-37
作者:EAD, HAMED A.、HASSANEEN, HAMDI M.、ABDALLAH, MAGDA A.、MOUSA, HIYAM A. H.
DOI:——
日期:——
Design, synthesis, and photophysics of bi- and tricyclic fused pyrazolines
作者:Alexandra V. Popova、Ali Kanaa、Vladislava S. Vavilova、Maria A. Mironova、Pavel A. Slepukhin、Enrico Benassi、Nataliya P. Belskaya
DOI:10.1039/d0nj06287a
日期:——
Three series of bi- and tricyclicfunctionalized new pyrazoline fluorophores have been synthesized for investigation of their photophysicalproperties. Spectral studies indicated significant absorption and emission properties. The quantum yields reached 93% and Stokes shifts increased up to 148 nm. The compounds exhibited positive solvato(fluoro)chromism. Fluorescence was sensitive to both structural
合成了三个系列的双环和三环功能化的新型吡唑啉荧光团,以研究其光物理性质。光谱研究表明明显的吸收和发射性质。量子产率达到93%,斯托克斯位移增加到148 nm。该化合物表现出正溶剂化(氟)色度。荧光对结构变化和微环境都敏感,特别是对质子溶剂,如EtOH,n -BuOH和DMSO / H 2敏感O的混合物,与乙二醇。实验结果得到了量子力学计算的支持。取代基的电子性质及其空间效应的修饰可以改变分子内电荷转移(ICT)的性质和方向。这些发现为开发具有可调光物理性质的新型稠合吡唑啉提供了宝贵的见识。吡唑啉表现出高强度的固态发射,使其适合用于光子学。活性官能团可用于结合吡唑啉和天然化合物,药物和诊断分子,以用于生物系统和药物中。