Pyrimidine derivative multifunctional lubricating oil additive as well as preparation method and application thereof

The invention discloses a pyrimidine derivative multifunctional lubricating oil additive as well as a preparation method and application thereof. The preparation method of the pyrimidine derivative multifunctional lubricating oil additive comprises the following steps: firstly, enabling alkylamine and chloroacetyl chloride to be subjected to amidation reaction to obtain alkyl chloroacetyl chloride; then taking 4,6-dimethyl-2-mercaptopyrimidine to react with carbon disulfide and the alkyl chloroacetyl chloride, so as to obtain the pyrimidine derivative multifunctional lubricating oil additive with a general formula I. The pyrimidine derivative multifunctional lubricating oil additive disclosed by the invention has the characteristics of simple preparation method, moderate technological conditions, easiness for obtaining raw materials, low synthesis cost, high synthesis yield and the like, and can be used as an extreme-pressure, wear-resisting, friction-reduction and anticorrosion additive of lubricating oil; t