- Preparation method of tralkoxydim
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The invention discloses a method for preparing tralkoxydim. The method comprises the following steps: preparing a first intermediate from 2,4,6-trimethylbenzaldehyde and acetone; preparing a second intermediate from the first intermediate, diethyl malonate and propionyl chloride; and preparing tralkoxydim by utilizing the second intermediate and ethoxyamine, wherein in the process of preparing the second intermediate, a condensation reaction and a rearrangement reaction are carried out at the same time, and after the first intermediate is prepared and before tralkoxydim is prepared, separation or purification treatment is not carried out. According to the invention, tralkoxydim is prepared by simultaneously carrying out condensation and rearrangement reactions and not carrying out a separation or purification process in the reaction process, so the steps of multiple times of separation, purification, transfer, feeding and the like in existing preparation methods are omitted, time and labor are saved, the consumption of reagents is reduced, a large amount of cost is saved, and the problems that a tralkoxydim preparation method is complex in step, product yield is low and layering emulsification is serious in an esterification reaction process in the prior art are solved.
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