Benzodioxole derivatives with inhibiting activity of acetylcholinesterase and its production and use

The preparation method that the present invention provides benzodioxole derivatives that a class is new and this compounds.This kind of compound represented by formula (I) or its pharmaceutically acceptable salt have inhibiting activity of acetylcholinesterase, it is possible to be used for treating or prevent Alzheimer's disease (Alzheimer ' s disease).R in formula (I) 1 、R 2 With being defined in the specification of A.