Method of synthesizing tetraalkyltin

The invention relates to a preparation method of an organotin product, in particular to a method of synthesizing tetraalkyltin through two-step method, belonging to the technical field of the chemical engineer. The method adopts a two-step method and the method comprises the following steps: firstly adopting metal magnesium, solvent and a small number of the prepared Grignard reagent to react andsynthesize Grignard reagent, and then dropwise adding stannic chloride to perform an alkylation reaction and obtain tetraalkyltin, wherein the added solvent is butyl ether solution, the Grignard reaction is performed at 55-75 DEG C for 2-4h under the nitrogen protective atmosphere, and the alkylation reaction is performed at 80-100 DEG C for 1-3h under the nitrogen protective atmosphere. Comparedwith the current one-step reaction, the method avoids the generation of the side reaction so that the Grignard exothermic reaction can be performed safely and stably and the reaction is easy to control. Compared with the tradi