| abstract |
The invention discloses ester compounds and a preparation method thereof. The invention provides the ester compounds represented by a formula 2, wherein R1 is C1-4 alkoxy or hydrogen, R2 is C1-4 acylamino or hydrogen, R3 is C1-4 alkyl, and R4 is C1-4 alkyl. The preparation method of the ester compounds represented by the formula 2 has the step that: a compound 4 and anhydride represented by a formula 5 are subjected to an acylation reaction, such that the eater compound 2 is obtained. |