SnCl<sub>2</sub>-catalyzed synthesis of dihydro-5<i>H</i>-benzo[<i>f</i>]pyrazolo[3,4-<i>b</i>]quinoline and dihydroindeno[2,1-<i>b</i>]pyrazolo[4,3-<i>e</i>]pyridine with high fluorescence and their photophysical properties
pyrazolopyridine-based derivatives bearing donor–acceptor (D–A) substituent groups on the phenyl ring, was synthesized by a mild reaction. Photophysical studies, including spectral analysis and single crystal X-ray diffraction, were conducted in order to investigate how the substituent affects the solution and examine the solid-state optical properties of the derivatives. Pyrazoloquinoline derivatives exhibited
Transition-Metal-Free Dehydrogenation of Benzyl Alcohol for C–C and C–N Bond Formation for the Synthesis of Pyrazolo[3,4-<i>b</i>]pyridine and Pyrazoline Derivatives
electrocyclization, the aza-Diels–Alder reaction, and the formation of intramolecular C–N bonds. These positive outcomes would open up the possibility of producing biologically active pyrazolo[3,4-b]pyridine and pyrazoline derivatives through a variety of possible reactions.
已经开发了一系列级联反应,产生一系列具有吡唑/吡唑啉核的官能化芳族杂环化合物。该方法依赖于无金属脱氢过程来生产原位苯甲醛。然后让产生的苯甲醛与一些其他物质反应,包括苯乙酮、吡唑胺和苯肼。由这些底物产生的中间体经历了几个化学过程,包括电环化、aza-Diels-Alder 反应和分子内 C-N 键的形成。这些积极成果将开启通过各种可能的反应生产具有生物活性的吡唑并[3,4- b ]吡啶和吡唑啉衍生物的可能性。
ORLOV, V. D.;KIROGA, X.;MASATOMO, N. N., XIMIYA GETEROTSIKL. SOED., 26<!>,(1987) N 9, 1247-1251