Synthesis and characterization of coumarin and dimedone-derived diazabicycles
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 majorcyclizedproduct was N-dealkylated diazabicycle 5, rather than the corresponding N-alkylated products. Alternatively, compound