6,7-dihydro-4H-pyrano[3,4-d]isoxazole-3-carboxylic acid 、 3-(5-amino-2-methylpyridin-3-yl)-N-methyl-1,6-naphthyridin-7-amine 在
N,N-二异丙基乙胺 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以38%的产率得到N-(6-methyl-5-(7-(methylamino)-1,6-naphthyridin-3-yl)pyridin-3-yl)-6,7-dihydro-4H-pyrano[3,4-d]isoxazole-3-carboxamide