Zinc Chloride Catalyzed Collective Synthesis of Arylmethylene Bis(3- hydroxy-2-cyclohexene-1-ones) and 1,8-Dioxo-octahydroxanthene/acridine Derivatives
作者:Subramaniapillai Ganesan、Jagatheeswaran Kothandapani、Asaithampi Ganesan
DOI:10.2174/1570178611666140612211155
日期:2014.9
Catalytic amount of ZnCl2 efficiently promoted rapid synthesis of arylmethylene bis(3-hydroxy-2-cyclohexene-
1-one) in water at room temperature in excellent yield. At elevated temperature, ZnCl2 also catalyzed one-pot synthesis of
1,8-dioxo-octahydroxanthene and 1,8-dioxo-decahydroacridine derivatives in good yield. In specific instances, unusual
dissociation of dimedone from the arylmethylene bis(3-hydroxy-2-cyclohexene-1-one) was identified in the reaction medium.
It was minimized/avoided by the addition of known excess dimedone to the reaction mixture in the one-pot synthesis
of 1,8-dioxo-octahydroxanthene
催化量的 ZnCl2 在室温下有效促进了水相中芳基亚甲基双(3-羟基-2-环己烯-1-酮)的快速合成,所得产率优异。在升高温度下,ZnCl2 还催化了一锅法合成 1,8-二氧代-八氢萘和 1,8-二氧代-十氢氟啶类化合物,产率良好。在特定情况下,反应介质中观察到芳基亚甲基双(3-羟基-2-环己烯-1-酮)中二美烯的不寻常解离。通过向反应混合物中添加已知过量的二美烯,可以将其最小化或避免,在 1,8-二氧代-八氢萘的一锅法合成中。