Method for preparing alpha-aryl nitrile and compound

The invention discloses a method for preparing alpha-aryl nitrile, which comprises the following steps: assembling aryl sulfoxide and alpha, beta unsaturated nitrile under the action of an activator to form a rearrangement precursor, rearranging the rearrangement precursor under the action of alkali to obtain a rearrangement intermediate, adding inorganic alkali, and reacting at room temperature to obtain alpha-aryl nitrile. The invention also discloses a product obtained by the preparation method. Compared with the prior art, the method synthesizes alpha-aryl nitrile from aryl sulfoxide and alpha, beta unsaturated nitrile under mild conditions, and has the advantages that 1) the method is mild in reaction condition, good in selectivity, high in yield, easy in product separation, simple tooperate and good in functional group compatibility; 2) the raw materials used in the method are cheap and easily available, so that the defects that the alkalinity is too strong, the reaction condition requirement is strict