RU2379891C1 - Growth stimulatig agent for presowing seed treatment - Google Patents

Abstract

FIELD: agriculture.

SUBSTANCE: here is disclosed growth stimulating agent containing as active ingredient hexa-hydro-1,2,4-triazonine-3 of formula

EFFECT: increased productivity of agricultural crops.

3 tbl, 5 ex

Description

The invention relates to the creation of new growth-promoting agents from a number of heterocyclic compounds, namely, compounds of derivatives of 1,2,4-triazinones, which can be used in agriculture.

The use of 3,6-dimethyl-1,2,4-triazines azomethines as growth-promoting agents is known. The disadvantage is the lack of growth-promoting activity of the compounds.

Close in structure (prototype) are 1,2,4-triazines / RF patent No. 2146251, class. C07D 253/06, A01N 43/707; 03/10/2000. Bull. Number 7.

The disadvantage is the lack of growth-promoting activity of the compounds.

The invention solves the technical problem of increasing the productivity of crops.

The invention consists in the creation of a growth-promoting agent for presowing seed treatment containing hexahydro-1,2,4-triazinon-3 as an active ingredient

The preparation of new compounds is illustrated by the following examples.

Example 1. One-step method for producing hexahydro-1,2,4-triazinone-3.

In a three-necked flask equipped with a mechanical stirrer, reflux condenser and dropping funnel, 30 ml of dimethyl sulfoxide (DMSO) was charged; 5.57 g (0.05 mol) of semicarbazide; 5.3 g (0.05 mol) of sodium carbonate; 7 ml (0.09 mol) of 1,2-dichloroethane. Previously, each initial component of the reaction mass was dissolved in DMSO. The reaction mass was heated in a water bath (60 ... 65 ° C) for four hours. At the end of the reaction, colorless crystals precipitated in the filtrate, which were filtered, washed with ethyl alcohol, and dried in air. The yield of hexahydro-1,2,4-triazinone-3 is 65%.

Mp ° C: 194.

IR spectrum, cm ^-1 : 1680, 1550, 3300, 3450.

Mass spectrum, m / e: 101.057, 81.092.

Elemental analysis,%:

Found (N): 40.7

Calculated (N): 41, 61

Example 2. A two-stage method for producing hexahydro-1,2,4-triazinone-3.

5.57 g (0.05 mol) of semicarbazide and 5.3 g (0.05 mol) of sodium carbonate were charged into a three-necked flask equipped with a mechanical stirrer, reflux condenser and dropping funnel. With stirring, 4 ml (0.05 mol) of 1,2-dichloroethane in 10 ml of methanol were pinned through a dropping funnel. The reaction mass was stirred at a temperature of 25 ... 30 ° C for four hours. The crystals precipitated after cooling were separated and recrystallized from methanol.

The resulting 1-chloroethylsemicarbazide is a colorless crystal soluble in water. The molecular weight of 137.5, melting point 122-124 ° C.

In the second stage, 1-chloroethylsemicarbazide was condensed to the target product - hexahydro-1,2,4-triazinon-3.

The synthesis was carried out by boiling in dimethylformamide in the presence of sodium bicarbonate. The yield of the target product is 62%.

The physicochemical characteristics of hexahydro-1,2,4-triazinone-3 are identical to those of the compound obtained above.

Example 3. Laboratory biological tests of the claimed growth stimulating agent.

Seeds of wheat, cucumbers, radishes, wikis were laid out in Petri dishes and 4 ml of working solution were poured. Then the Petri dishes were placed in a thermostat for two days at a temperature of 27 ° C. The working concentration of the preparations is 1, 10 mg / l. The repetition of each option is 4 times. Phytotoxicity of compounds was determined after two days according to the length (1) and weight (m) of etiolated seedlings. The results of the experiment are shown in table 1.

Example 4. Vegetative testing of the claimed growth stimulating agent

The seeds of corn and sunflower treated with the preparations were sown in vegetation vessels with a diameter of 25 cm; the repetition of each variant was 4-fold. The concentration of 1-10 mg / l. Two weeks after sowing, the effectiveness of the compounds in comparison with the preparation was determined by the mass of plants. The results of the experiment are shown in table 2.

Table 1 - Biological effectiveness of the claimed growth stimulating agent in laboratory experiments,% Option Concentration, Wheat Cucumbers Radish Vika experience mg / l l m l m l m l m The control water one hundred one hundred one hundred one hundred one hundred one hundred one hundred one hundred Prototype one 117 114 108 109 112 110 105 102 10 117 112 102 one hundred 108 110 one hundred 102 Roststim- one 120 124 115 117 117 120 115 121 licking 10 127 120 124 109 121 121 110 112 means

table 2 - Vegetation tests of the declared growth-stimulating agent,% Experience option Concentration, Sunflower Corn mg / l The control water one hundred one hundred Prototype one 109 112 10 117 113 Roststim- one 119 122 licking 10 127 125 means

Example 5. The treated seeds of barley, wheat, rye preparations in a concentration of 10 mg / l, were sown in vegetation vessels with a diameter of 25 cm, two weeks after sowing, measurements were made of the length (l) and weight (m) of the plants. The data are shown in table 3.

Table 3 Growth-stimulating activity of the claimed growth-stimulating agent Option Concentration, Barley Wheat Rye experience mg / l l m l m l m The control - one hundred one hundred one hundred one hundred one hundred one hundred Prototype 10 110 105 117 113 119 112 Roststim- licking 10 117 119 119 123 125 122 means

The data presented in tables 1, 2, 3 show that the new claimed compound at a concentration of 1-10 mg / l exhibits a stimulating effect, which affects the increase in the length (l) and mass (m) of the seedlings. According to the degree of effectiveness, the claimed growth-promoting agent is better than the prototype taken.

Claims (1)

Growth-stimulating agent for presowing treatment of seeds containing hexahydro-1,2,4-triazinon-3 as an active ingredient.