Condensation of 3-cyano-7-diethylamino-N-ethoxycarbonyl-iminocoumarin with various hydrazides as N-nucleophiles gave a new series of 2-oxo-2H-1-benzopyrano[2,3-d]pyrimidines bearing an acylhydrazino fragment in the 4-position. The structures of the products obtained were characterized using IR, 1H NMR, 13C NMR and elemental analysis. The optical properties were reported for three of these compounds
                                    3-
氰基-7-
二乙基氨基-N-乙氧基羰基-亚
氨基
香豆素与各种酰
肼作为N-亲核试剂的缩合反应,得到一系列新的2-oxo- 2H -1-苯并
吡喃并[2,3- d ]
嘧啶,其中带有4位。使用IR,1 H NMR,13 C NMR和元素分析对获得的产物的结构进行表征。报告了其中三种化合物的光学性质。J.杂环化学,(2009)。