作者:Jiun-Ting Lai、Pei-Yu Kuo、Yung-Her Gau、Ding-Yah Yang
DOI:10.1016/j.tetlet.2007.09.006
日期:2007.10
synthesis involved the acid-catalyzed coupling of 4-aminocoumarin or dimedone derivatives with amino alcohols 3 or 7 to give the ring-opened forms 4, 10, 12 and the ring-closed diazabicycles 5, 6, 9, 11. When 4-alkylaminocoumarins were used as the coupling reagents, the major cyclized product was N-dealkylated diazabicycle 5, rather than the corresponding N-alkylated products. Alternatively, compound
从对氨基苯甲酸酯和对硝基苯甲醛分三到四个步骤制备了一系列二氮杂双环衍生物。合成的关键步骤涉及酸催化的4-氨基香豆素或双甲酮衍生物与氨基醇偶合3或7,得到开环形式4,10,12和环形封闭diazabicycles 5,6,9,11。当使用4-烷基氨基香豆素作为偶联剂时,主要的环化产物是N-脱烷基二氮杂双环5,而不是相应的N-烷基化产物。或者,通过DDQ氧化将化合物4环化,生成醌亚胺13。合成的化合物的分子结构通过X射线晶体学表征。