An alternative approach to the synthesis of [1,2,4]triazolo[1,5‐
<i>a</i>
]pyridine‐8‐carbonitriles, their crystal structure, and
<scp>DFT</scp>
calculations
作者:Dmytro M. Khomenko、Tetyana V. Shokol、Roman O. Doroshchuk、Viktoriia S. Starova、Ilona V. Raspertova、Sergiu Shova、Rostyslav D. Lampeka、Yulian M. Volovenko
DOI:10.1002/jhet.4256
日期:2021.6
New representatives of [1,2,4]triazolo[1,5-a]pyridine-8-carbonitriles were synthesized via the condensation of β-diketones or β-dialdehydes and characterized using MS spectrometry, 1H, 13C and, 19F NMR and IR spectroscopy. Crystal structures of two compounds were established using X-ray analysis and showed that title compounds are prone to the formation of planar molecules. The absence of band responsible
[1,2,4]三唑并[1,5 - a ]吡啶-8-甲腈的新代表是通过β-二酮或β-二醛的缩合合成的,并使用MS光谱法、1 H、13 C和19进行表征F 核磁共振和红外光谱。使用 X 射线分析确定了两种化合物的晶体结构,结果表明标题化合物易于形成平面分子。使用 DFT 计算方法解释了在含三氟甲基的化合物中没有负责 CN 伸缩振动的带,这也表明氟的引入对 HOMO 和 LUMO 之间的能隙有显着影响。