Synthesis of novel 25-hydroxyprotopanaxadiol derivatives by methylation and methoxycarbonylation using dimethyl carbonate as a environment-friendly reagent and their anti-tumor evaluation
methylated products on the activity and to identify more potent, higher selectivity compounds, we modified 25-OH-PPD with a green environment-friendly and non-toxic chemical dimethyl carbonate (DMC), which plays the role of both solvent and reagent. This experiment yielded 14 derivatives. Their in vitro anti-tumor activities were tested on two different human tumor cell lines (HeLa and DU145) and one normal