Acetals of diaryl ketones with nitro, halo and methoxy substituents are easily prepared in high yield by treatment with an alcohol and the corresponding trialkyl orthoformate in the presence of a catalytic amount of trifluoromethanesulfonic acid.
在一定量的
三氟甲磺酸催化下,用
乙醇和相应的
原甲酸三烷基酯处理具有硝基、卤代和甲氧基取代基的二芳基酮的
乙酸酯,很容易就能以高产率制备出来。