作者:N. A. Kondratova、O. N. Kazheva、G. G. Aleksandrov、O. A. D’yachenko、V. F. Traven
DOI:10.1007/s11172-009-0260-7
日期:2009.9
2,3-Dihydrofuro[3,2- c]coumarin-3-one reacts with aromatic amines in two pathways, depending on the solvent. The reactions in ethanol afford its enamines, while the use of acetic acid favors the formation of enamines of the 2,3-dihydrofuro[3,2-c]coumarin-3-one dimer. Electronic absorption spectroscopy in different solvents revealed that the enamines obtained can undergo tautomeric transformations. The product of a reaction of 2,3-dihydrofuro-[3,2-c]coumarin-3-one with 4-bromoaniline exists in the enamine form (X-ray diffraction data).
2,3-二氢呋喃并[3,2-c]香豆素-3-酮与芳香胺的反应根据溶剂的不同有两种途径。在乙醇中的反应产生其烯胺,而使用乙酸则有利于 2,3-二氢呋喃并[3,2-c]香豆素-3-酮二聚体烯胺的形成。在不同溶剂中的电子吸收光谱显示,得到的烯胺可以发生同分异构体的转化。2,3- 二氢呋喃并[3,2-c]香豆素-3-酮与 4-溴苯胺反应的产物以烯胺形式存在(X 射线衍射数据)。