On the reactivity of 4-cyano-1,3-dichloro-7-methyl-5,6,7,8-tetrahydro-2,7-naphthyridine with several amines in different experimental conditions: monosubstitution, disubstitution, and a new unexpected rearrangement
作者:Samvel N. Sirakanyan、Viktor G. Kartsev、Domenico Spinelli、Athina Geronikaki、Azat S. Noravyan、Anush A. Hovakimyan、Henrik A. Panosyan、Armen G. Ayvazyan、Rafael A. Tamazyan
DOI:10.1016/j.tet.2014.05.070
日期:2014.8
experimental conditions, the mono- and the di-amino-substituted derivatives of 5,6,7,8-tetrahydro-2,7-naphthyridines 2 and 3, respectively. Thus, by carrying out the reaction in a low-boiling solvent and in the presence of a quasi-stoichiometric amount of amine, the mono-substituted derivatives 2 were obtained, which under harsher conditions was transformed into the diamino derivatives 3 when using an excess
研究了4-氰基-1,3-二氯-7-甲基-5,6,7,8-四氢-2,7-萘啶1与亲核试剂的反应性。1中两个氯原子的不同反应活性使我们能够通过使用不同的实验条件获得5,6,7,8-四氢-2,7-萘啶2和5、6,7,8-四氢-2,7-萘啶的单氨基和二氨基取代的衍生物3,分别。因此,通过在低沸点溶剂中和在准化学计量的胺存在下进行反应,获得了单取代的衍生物2,其在更苛刻的条件下转化为二氨基衍生物3。当使用过量的胺时。在合成一些二氨基衍生物3期间,观察到新的重排,形成了3,4-二氢-2,7-萘啶4的1-氧代衍生物。通过X射线晶体学证实了意外化合物4的结构。初步提出了一种重排机制。