Preparation and plant activate antipathogen activity of benzo carboxylate derivatives of 1,2,3-thiadiazole
A technology of thiadiazole and derivatives, applied in the field of plant activation and disease resistance activity, can solve the problems of unsatisfactory water solubility and slow action speed, and achieve the effects of good water solubility, disease resistance activity, and damage prevention.
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[0045] The following examples and bioassay results can be further used to illustrate the plant-activated disease resistance activity of the compounds of the present invention, but are not meant to limit the present invention.
[0046] Synthetic example
[0047] Synthesis of compound 1
[0048] 1. Preparation of benzo[1,2,3]-thiadiazole-7formyl chloride
[0049] Add 1.80 g (0.01 mol) of benzo[1,2,3]-thiadiazole-7-carboxylic acid and 10 ml of thionyl chloride into a 50 ml round-bottomed flask, heat and reflux at 80-90°C for 8 hours, Evaporate excess thionyl chloride under reduced pressure to obtain a brownish-yellow solid, and the intermediate benzo[1,2,3]-thiadiazole-7-formyl chloride is sealed and stored in a vacuum desiccator for subsequent use. The amount of the compound can be scale up or down accordingly.
[0050] 2. Compound 1: Synthesis of benzo[1,2,3]-thiadiazole-7-carboxylic acid (N,N-dimethyl)ethyl ester
[0051] Add 3.60 g (0.02 moles) of benzo[1,2,3]-thiadiazole...
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