Cascade Synthesis of Polyoxygenated 6<i>H,</i>11<i>H</i>-[2]Benzopyrano-[4,3-<i>c</i>][1]benzopyran-11-ones
作者:Mikael I. Naumov、Sergey A. Sutirin、Andrey S. Shavyrin、Olga G. Ganina、Irina P. Beletskaya、Véronique Bourgarel-Rey、Sébastien Combes、Jean-Pierre Finet、Alexey Yu. Fedorov
DOI:10.1021/jo062592v
日期:2007.4.1
2-(Methoxymethoxymethyl)aryllead triacetates, obtained in situ from the corresponding arylboronic acids, reacted with 4-hydroxycoumarins, leading to 3-(2-methoxymethoxymethyl)aryl-4-hydroxycoumarin derivatives in good to high yields. These compounds underwent a cascade sequence of reactions, deprotection-halogenation-annulation, to afford polyoxygenated tetracyclic 6H,11H-[2]benzopyrano-[4,3-c] [1]benzopyran-11-ones in good yields. Some compounds showed a moderate cytotoxicity against human epithelial mammary HBL100 cells.