Synthesis of 7-substituted 3-aryl-1,6-naphthyridin-2-amines and 7-substituted 3-aryl-1,6-naphthyridin-2(1H )-ones via diazotization of 3-aryl-1,6-naphthyridine-2,7-diamines
作者:Andrew M. Thompson、H. D. Hollis Showalter、William A. Denny
DOI:10.1039/b002599m
日期:——
The preparation of 3-aryl-7-halo-1,6-naphthyridin-2-amines and 3-aryl-7-halo-1,6-naphthyridin-2(1H)-ones from the diazotization of 3-aryl-1,6-naphthyridine-2,7-diamines is reported. The reactions were investigated in various solvents (concentrated HCl, 50% HBF4, 70% HF–pyridine, 20% and 90% H2SO4, dilute HCl, and neat TFA). By appropriate choice of solvent and other conditions, good yields of the target compounds could be obtained, although in some cases a variety of different side products was also produced. Subsequent displacement of the 7-halogen substituents with alkylamines provides a route to more complex 7-substituted 1,6-naphthyridine derivatives that are potential tyrosine kinase inhibitors.
由3-芳基-1重氮化制备3-芳基-7-卤代-1,6-萘啶-2-胺和3-芳基-7-卤代-1,6-萘啶-2(1H)-酮报道了 ,6-萘啶-2,7-二胺。在各种溶剂(浓 HCl、50% HBF4、70% HF-吡啶、20% 和 90% H2SO4、稀 HCl 和纯 TFA)中研究了反应。通过适当选择溶剂和其他条件,可以获得目标化合物的良好产率,尽管在某些情况下也会产生各种不同的副产物。随后用烷基胺取代 7-卤素取代基提供了获得更复杂的 7-取代 1,6-萘啶衍生物的途径,这些衍生物是潜在的酪氨酸激酶抑制剂。