A Simple BF3•Et2O-mediated Cycloaddition Reaction to the Formation of Cyclic Monoterpenoid Pyrano[3,2-a]carbazole Alkaloids
作者:Siow-Ping Tan、Mohd Azlan Nafiah
DOI:10.2174/1570178617999200730204856
日期:2021.5
A Lewis acid BF3•Et2O-mediated intramolecularcycloaddition reaction of mahanimbine (1) is described. Three cycloadducts, bicyclomahanimbine (2), cyclomahanimbine (3) and murrayazolinine (4) were obtained. The structural characterization of these compounds was determined by 1D and 2D NMR experiments. These compounds showed no cytotoxic activity against human MRC-5 cells (IC50 > 60 μg/mL). Compound