An efficient route to 1,8-dioxo-octahydroxanthenes and -decahydroacridines using a sulfated zirconia catalyst
作者:Sandeep S. Kahandal、Anand S. Burange、Sandip R. Kale、Pepijn Prinsen、Rafael Luque、Radha V. Jayaram
DOI:10.1016/j.catcom.2017.03.017
日期:2017.7
Sulfated zirconia results to be a very efficient catalyst for the synthesis of 1,8-dioxo-octahydroxanthenes and 1,8-dioxo-decahydroacridines without tedious work-up procedures. While 1,8-dioxo-octahydroxanthenes are prepared from aldehyde and 5,5-dimethyl-1,3-cyclohexenedione (dimedone), 1,8-dioxo-decahydroacridines are prepared from this reactant mixture with amines. This method provides a mild catalytic
硫酸化的氧化锆是一种非常有效的催化剂,用于合成1,8-二氧-八氢黄嘌呤和1,8-二氧-十氢ac啶,无需进行繁琐的后处理程序。尽管由醛和5,5-二甲基-1,3-环己二酮(二甲酮)制备1,8-二氧-八氢黄嘌呤,而由该反应物与胺的混合物制备1,8-二氧-十氢ac啶。该方法为合成功能化的x吨和a啶衍生物提供了温和的催化方案。通过XRD,FT-IR,TGA-DSC,SEM-EDAX和表面酸度对催化剂进行了表征,并显示了高达6个连续循环的优异可重复使用性。