作者:Vegar Stockmann、Sebastian Primpke、Anne Fiksdahl
DOI:10.1002/jhet.580
日期:2011.5
As part of our current investigations of nitropyridines, we hereby report the preparation of a new annulated heterocycle by C‐azo coupling. Thus, the azacinnoline, pyrido[3,4‐c]pyridazin‐4(1H)‐one (38%), was prepared from 4‐acetyl‐3‐aminopyridine via diazotization. 1H, 13C, and 15N NMR spectroscopic investigations revealed that the azacinnoline exclusively exists in the NH‐keto tautomeric form in DMSO‐d6
作为我们目前对硝基吡啶研究的一部分,我们在此报告通过C-偶氮偶合制备新的环状杂环的方法。因此,通过重氮化从4-乙酰基-3-氨基吡啶制备了氮杂多酚,吡啶并[3,4-c]哒嗪-4(1 H)-one(38%)。1 H,13 C和15 N NMR光谱研究表明,氮杂肉桂碱仅以NH-酮互变异构形式存在,DMSO- d 6,CD 3 OD和D 2 O. J. Heterocyclic Chem。,(2011)。