Efficient Synthesis of Pyrido[3,4-c]cinnolines and Pyrido[3,2-c]cinnolines by Intramolecular Azo Coupling Reaction of 4,6-Diaryl-3-pyridine Diazonium Salts and Study of Their Antiviral Activity
作者:Galina P. Sagitullina、Alina Yu. Fisenko、Vladislav Yu. Shuvalov、Evgenii V. Arshinov、Larisa V. Glizdinskaya、Larisa N. Shishkina、Nikolay I. Bormotov、Olga A. Serova
DOI:10.1055/a-2230-0583
日期:2024.4
A new method is proposed for the synthesis of pyrido[3,4-c]cinnolines and pyrido[3,2-c]cinnolines. Pyridine-3-diazonium tetrafluoroborates, containing donor methoxy groups in one of the aryl substituents, form pyridocinnolines at 0 °C by intramolecular azo coupling reaction. The 2′-methoxy group in the aryl substituent of the pyridine-3-diazonium salt participates in the aromatic nucleophilic substitution
提出了一种合成吡啶并[3,4- c ]肉啉和吡啶并[3,2- c ]肉啉的新方法。吡啶-3-重氮四氟硼酸盐,在芳基取代基之一中含有供体甲氧基,在 0 °C 下通过分子内偶氮偶联反应形成吡啶啉。吡啶-3-重氮盐芳基取代基中的2'-甲氧基参与芳香族亲核取代反应,导致重氮基消除,形成苯并呋喃并[2,3- c ]吡啶和苯并呋喃[3] ,2- b ]吡啶。以高产率分离中间体和目标反应产物。