Synthesis of 5‐oxo‐5
<i>H</i>
‐chromeno[3,4‐
<i>c</i>
]pyridine‐1‐carbonitriles and features of their NMR spectra
作者:Mohanad Shkoor、Haw‐Lih Su、Suzan Ahmed、Sarah Hegazy
DOI:10.1002/jhet.3826
日期:2020.2
leading to 5‐oxo‐5H‐chromeno[3,4‐c]pyridine‐1‐carbonitriles were investigated. Reactions of 3‐aminocrotonirile with substituted salicylaldehydes provided 5‐oxo‐5H‐chromeno[3,4‐c]pyridine‐1‐carbonitriles with the same substituent on positions 2 and 4 of the system. The reaction of 3‐aminocrotonirile with variety of substituted 3‐acetylcoumarins lead to 5‐oxo‐5H‐chromeno[3,4‐c]pyridine‐1‐carbonitriles
研究了导致5-氧代-5 H - chromeno [3,4- c ]吡啶-1-腈的两种不同方法。3-氨基巴豆腈与取代的水杨醛的反应提供了在系统2和4位上具有相同取代基的5-氧代-5 H - chromeno [3,4- c ]吡啶-1-腈。3-氨基巴豆腈与多种取代的3-乙酰香豆素的反应导致在位置2和4上具有不同取代基的5-氧代-5 H-色酚[3,4- c ]吡啶-1-腈经分光镜方法证实。在具有固定几何结构的结构中腈部分的存在导致芳族质子在10位置的高度低场移位。1 H NMR谱。取代基的电子因子引起该低场偏移的变化。