CN100488962C - Derivative of thiadiazoles containing cyclo oxdiazole, synthetic method, and biological activity - Google Patents

Abstract

This invention provides a method for synthesizing 1,2,3-thiadiazole derivatives containing furodiazole ring, and their bioactivity. Fifteen thiadiazole derivatives containing furodiazole ring are synthesized from 1, 2, 3-thiadiazole and 1, 3, 4-furodiazole. This invention discloses chemical structures of these 1, 2, 3-thiadiazole derivatives and their intermediates, their synthesis method, and their inhibitory effect on plant pathogenetic fungi and induced tobacco anti-TMW effect.

Description

The thiadiazoles derivative of Han oxadiazole ring and synthetic method and biological activity

Technical field

Technical scheme of the present invention relates to and contain 1,2-diazole and 3, and the heterogeneous ring compound of 4-diazole is specifically related to [1,2,3] thiadiazoles derivative of Han oxadiazole.

Background technology

1; 3; 4-oxadiazole heterocyclic compounds has multiple biological activity; as anti-inflammatory activity and anti-microbial activity; the contriver once utilized the bioisostere principle to introduce pyridine ring and 1 simultaneously in a part; 3,4-oxadiazole heterocycle has synthesized 5-(3-pyridyl-or 4-pyridyl)-1,3; 4-oxadiazole-2-sulphur acetamides; part of compounds shows that preferably (Fan Zhijin etc. contain 1,3 of pyridine ring to fungicidal activity; synthetic and the bioactivity research of 4-oxadiazole derivative; SCI, 2004,25 (4): 663-666).Because 1,2, the 3-thiadiazoles heterocyclic compounds also has important biological, cotton defoliant [disleave spirit (N-phenyl-N '-1,2,3-thiadiazoles-5-urea, and plant activator Acibenzolar [benzo [1 TDZ)], 2,3]-and thiadiazoles-7-thiocarboxylic acid methyl esters, BTH] and rice field sterilant tiadinil (3 '-chloro-4,4 '-dimethyl-1,2,3-thiadiazoles-5-formylaniline, TDL) waiting commercial kind is exactly 1,2,3-thiadiazoles derivative (chemical structure sees Table 1), we have reported part 1,2 in the patent in early stage, the 3-thiadiazoles derivative has the (Fan Zhijin etc. of fine fungicidal activity, novel [1,2,3] thiadiazoles derivative and preparation method and use thereof, People's Republic of China's national inventing patent, accept the date: on February 20th, 2006, application number: 200610013185.5, the open date of publication number: CN1810808A.: on August 2nd, 2006); Under the subsidy of state natural sciences fund (30270883 and 20672062) and " 973 " plan (2003CB114402) and Tianjin applied basic research planning items (novel anti plant virus medicament Its Mechanisms), in order to enlarge the screening scope, the contriver utilizes the bioisostere principle that oxadiazole and two active groups of thiadiazoles are introduced to have synthesized with design in a part simultaneously to contain [1 of oxadiazole structural unit, 2,3]-derivative of thiadiazoles, and carried out the especially research of fungicidal activity and induced activity of biological assay, measurement result finds that part of compounds has certain fungicidal activity, and the anti-TMV's of majority of compounds evoking tobacco is active relatively poor.

Table 1 is commercial 1,2, the chemical structure of 3-thiadiazoles derivative

Summary of the invention

Technical problem to be solved by this invention is: new 4-methyl-5-(1 ' is provided, 3 ', 4 '-oxadiazole-2 '-yl)-1,2, the synthetic method of 3-thiadiazoles (E series), the activity and the corresponding screening method that provide this compounds to suppress pathogenic fungi also provide activity and the measuring method thereof of measuring such new compound evoking tobacco resisting tobacco mosaic virus simultaneously.

The present invention solves this technical problem the technical scheme that is adopted: the chemical structure of general formula E series with fungicidal activity and induced activity [1,2,3]-thiadiazoles derivative is as follows, and its concrete chemical structural formula represents to see Table 2:

E series

1,2 of the novel Han oxadiazole of table 2 synthetic of the present invention, the chemical structure characteristic of 3-thiadiazoles derivative

2-of the present invention (4 '-methyl isophthalic acid ', 2 ', 3 '-thiadiazoles-5 '-)-5-replacement-1,3, the synthetic method of 4-oxadiazole derivative (E series) is as follows:

Specifically be divided into following steps:

A.4-methyl isophthalic acid, 2, the preparation of 3-thiadiazoles-5-formyl hydrazine:

With 6.9g (40mmol) 4-methyl isophthalic acid, 2,3-thiadiazoles-5-ethyl formate and 44mmol hydrazine hydrate add in the there-necked flask of falling 50ml, reflux 10 hours, stirred overnight at room temperature adds the intact ester of 40ml sherwood oil flush away unreacted in reaction system, suction filtration, the dry yellow solid 4.9g that gets, yield 77.5%, the consumption of this compound can or dwindle by corresponding proportion expansion;

B. novel 2-(4 '-methyl isophthalic acid ', 2 ', 3 '-thiadiazoles-5 '-)-5-replacement-1,3, the preparation of 4-oxadiazole derivative (E series):

In the 100ml there-necked flask, add 5mmol 4-methyl isophthalic acid, 2, the POCl that 3-thiadiazoles-5-formyl hydrazine and equimolar substituted carboxylic acid and 7.5ml heavily steamed ₃, 120 ℃ were refluxed 4～6 hours, and were cooled to room temperature, with in the reaction system impouring 80ml frozen water, standing over night is washed the solid that leaches earlier with diluted sodium hydroxide solution under stirring, wash with water again to neutrality, drying then, gets pure product with 200 orders～300 order silica gel column chromatographies, eluent is 60～90 ℃ sherwood oil and an ethyl acetate, according to the difference of product, volume ratio is certain ratio of selecting between 2:1～5:1, mensuration product fusing point, ¹Physical and chemical parameters such as H NMR and ultimate analysis, the consumption of this compound can or dwindle by corresponding proportion expansion;

This analog derivative (E series) also can adopt following method synthetic: add 5mmol 4-methyl isophthalic acid in the 100ml there-necked flask, 2,3-thiadiazoles-5-formyl hydrazine and equimolar replacement acyl chlorides and the anhydrous THF of 10ml, refluxed 4～6 hours, be cooled to room temperature, slough solvent under the rotary evaporation decompression, in resistates, add 10ml POCl then ₃, 120 ℃ were refluxed the POCl that pressure reducing and steaming is excessive 6 hours ₃Be cooled to room temperature, stir down in the thing impouring 80ml frozen water with the remnants of reaction system, fully stir, with 20 * 3 dichloromethane extractions, organic phase is used saturated sodium bicarbonate aqueous solution and washing respectively behind the separatory, suction filtration behind anhydrous sodium sulfate drying, slough solvent under the rotary evaporation decompression, then, get pure product with 200 orders～300 order silica gel column chromatographies, eluent is 60～90 ℃ sherwood oil and an ethyl acetate, according to the difference of product, volume ratio is certain ratio of selecting between 2:1～5:1, mensuration product fusing point, ¹Physical and chemical parameters such as H NMR and ultimate analysis, the consumption of this compound can or dwindle by corresponding proportion expansion;

C. novel 2-(4 '-methyl isophthalic acid ', 2 ', 3 '-thiadiazoles-5 '-)-5-replacement-1,3, the mensuration that 4-oxadiazole derivative (E series) influences the pathogenic fungi growth activity:

Novel 2-of the present invention (4 '-methyl isophthalic acid ', 2 ', 3 '-thiadiazoles-5 '-)-5-replacement-1,3, the measuring method of 4-oxadiazole derivative (E series) fungicidal activity or bacteriostatic activity is as follows:

Adopt thalli growth rate assay method (Mycelium growth rate test), detailed process is, get the 5mg sample dissolution in an amount of dimethyl formamide, then with containing the medicament that a certain amount of polysorbas20 emulsifier aqueous solution is diluted to 500 μ g/ml, reagent agent is respectively drawn 1ml under aseptic condition inject in the culture dish, add the 9ml substratum more respectively, make 50 μ g/ml pastille flat boards after shaking up, do blank with the flat board that adds the 1ml aqua sterilisa, punch tool with diameter 4mm cuts the bacterium dish along the mycelia outer rim, move on the pastille flat board, being equilateral triangle puts, every processing repeats 3 times, culture dish is placed on cultivation in 24 ± 1 ℃ of constant incubators, and colony diameter to be contrasted expands to 2～3cm " Invest, Then Investigate " and respectively handles bacterium dish expansion diameter, averages, relatively calculate relative bacteriostasis rate with blank, comprise more than 20 kind of frequently seen plants pathogenic bacteria for the examination bacterial classification;

Novel 2-D. of the present invention (4 '-methyl isophthalic acid ', 2 ', 3 '-thiadiazoles-5 '-)-5-replacement-1,3, the mensuration that 4-oxadiazole derivative (E series) influences the wheat leaf rust growth activity:

Of the present invention novel 2-(4 '-methyl isophthalic acid ', 2 ', 3 '-thiadiazoles-5 '-)-5-replacement-1,3,4-oxadiazole derivative (E series) is as follows to the measuring method of the fungicidal activity of wheat leaf rust (Urediospore of puccinia.recondita Rob.ex Desm.f.sp.puccinia triticina Eriks) or bacteriostatic activity:

Adopt live body plant method (in vivo), detailed process is, with selected susceptible seed, soak 4h with tap water, clean up, place 28 ℃ of constant temperature to break bud 24h, sowing when wheat seedling grows to 1 leaf, 1 heart, promptly can be used for experiment, standby wheat seedling is sprayed water earlier, spray spore powder immediately, the frame of will preserving moisture covers completely with plastic cloth, 20 ± 2 ℃ of controlled temperature, humidity is more than the RH90%, and 24h preserves moisture.The wheat leaf blade of preserving moisture is sprayed compound to be measured, when contrast was fully fallen ill, the vaned sorus number of inquiry agency calculated each processing, comprise the average sorus number of leaf of blank, be calculated as follows out the inhibition effect of test compound wheat leaf rust

$E=\frac{\mathrm{CK}-T}{\mathrm{CK}}\×100$

Wherein: E is relative effect, unit: %

CK is the average sorus number of blank leaf, unit: heap

T is the average sorus number of treatment group, unit: heap;

Novel 2-E. of the present invention (4 '-methyl isophthalic acid ', 2 ', 3 '-thiadiazoles-5 '-)-5-replacement-1,3, the mensuration of 4-oxadiazole derivative (E series) inducing anti-disease activity:

2-of the present invention (4 '-methyl isophthalic acid ', 2 ', 3 '-thiadiazoles-5 '-)-5-replacement-1,3, the active screening method of 4-oxadiazole derivative (E series) evoking tobacco resisting tobacco mosaic virus (TMV) is as follows:

I. the selection of standard plant inducing anti-disease activator: selecting tiadinil (TDL) and diazosulfide (BTH) is the plant inducing anti-disease activator of standard, the vitro Screening of all compounds adopts 500 μ g/ml, the mensuration of BTH induced activity adopts 100 μ g/ml (Bion 50% WG, purity 50%), TDL (purity is greater than 99.5%) and compound of the present invention adopt 500 μ g/ml;

II. the active screening method of the anti-TMV of new compound evoking tobacco: the mensuration of the direct antiviral activity that exsomatizes adopts half page of method to carry out; It is common cigarette with the seedling age unanimity that live body is induced, 3 basins are one group, cigarette seedling respectively at inoculation pre-treatment in preceding 7 days, processing mode comprises: spray test compound solution 2 to 3 times, each 20ml, the 7th day frictional inoculation TMV on the tobacco leaf that newly grows, place its growth optimal temperature and the following cultivation of illumination after 3 days the cigarette seedling, check incidence, comprehensive scab number is calculated as follows out the inducing anti-disease toxic effect fruit of test compound to TMV, 3 repetitions are established in each processing, and contrast divides blank and standard chemicals treatment to contrast 2 kinds; The relative effect of test compounds is divided into 4 grades: A, B, C, D, concrete data are the A level: induce effect〉70%, for excellent; B level: induce effect 70～50%, for very; C level: induce effect 30～50%, for poor; D level: induce effect＜30% to be considered as not having and induce effect:

$R=\frac{\mathrm{CK}-I}{\mathrm{CK}}\×100$

Wherein, R is the induce effect of new compound to the anti-TMV of tobacco, unit: %

CK is the average withered spot number of clear water contrast blade, unit: individual

I is for inducing the average withered spot number of handling rear blade, unit: individual through compound;

The invention has the beneficial effects as follows: 1,2,3-thiadiazoles-5-carboxamides derivatives TDL is a plant inducing anti-disease activator, and the present invention has carried out the optimization of first guide structure to this compound, and new synthetic compound has further been carried out the screening of bacteriostatic activity and the mensuration of induced activity.

The present invention will more specifically describe the 4-methyl isophthalic acid of Han oxadiazole structural unit by specific preparation and biological activity determination embodiment, 2, synthetic and the biological activity of 3-thiadiazole derivative, but described embodiment only is used for specific description the present invention and unrestricted the present invention, especially its biological activity only illustrates, rather than the restriction this patent, concrete embodiment is as follows:

Embodiment 1

Compound 4-methyl isophthalic acid, 2, the preparation of 3-thiadiazoles-5-formyl hydrazine

With 6.9g (40mmol) 4-methyl isophthalic acid, 2,3-thiadiazoles-5-ethyl formate and 44mmol hydrazine hydrate add in the there-necked flask of falling 50ml, reflux 10 hours, stirred overnight at room temperature then, reaction system yellowly solid, add the intact ester of 40ml sherwood oil flush away unreacted, suction filtration, dry yellow solid 4.9g, the yield 77.5% of getting.

Embodiment 2

Synthetic and the structure of compd E-1 is identified

With 0.79g (5mmol) 4-methyl isophthalic acid, 2,3-thiadiazoles-5-formyl hydrazine and equimolar p-methylbenzoic acid join in the 100ml there-necked flask, add the POCl that 7.5ml heavily steamed ₃, 120 ℃ were refluxed 6 hours, and were cooled to room temperature.Stir down in the reaction system impouring 80ml frozen water, standing over night, the solid that leaches is washed with diluted sodium hydroxide solution earlier, wash to neutrality drying again with water, then, with 200～300 order silica gel column chromatographies, get pure product 0.32g, eluent is 60～90 ℃ sherwood oil and an ethyl acetate, volume ratio is 3:1, yield 25.0%.Measure fusing point and ¹H NMR, its chemical structural formula and physical and chemical parameter see Table 3 and table 4.By table 3 and table 4 as seen, this compound ¹HNMR shows and the corresponding chemical shift of its structure that the number of H and its structure are coincide.

Embodiment 3

Synthetic and the structure of compd E-2 is identified

With 0.32g (2mmol) 4-methyl isophthalic acid, 2,3-thiadiazoles-5-formyl hydrazine and equimolar anisic acid join in the 50ml there-necked flask, add the POCl that 3ml heavily steamed ₃, 120 ℃ were refluxed 6 hours, and were cooled to room temperature.Stir down in the reaction system impouring 80ml frozen water, static spending the night, the solid that leaches is washed with diluted sodium hydroxide solution earlier, wash to neutrality drying again with water, then, with 200～300 order silica gel column chromatographies, eluent is 60～90 ℃ sherwood oil and an ethyl acetate, and volume ratio is 2:1, get pure product 0.27g, yield 49.2%.Measure fusing point and ¹H NMR, its chemical structural formula and physical and chemical parameter see Table 3 and table 4.By table 3 and table 4 as seen, this compound ¹H NMR shows and the corresponding chemical shift of its structure that the number of H and its structure are coincide.

Embodiment 4

Synthetic and the structure of compd E-3 is identified

With 0.32g (2mmol) 4-methyl isophthalic acid, 2, the m-methyl benzoic acid of 3-thiadiazoles-5-formyl hydrazine and 0.29g (2.1mmol) joins in the 50ml there-necked flask, adds the POCl that 4m l heavily steamed ₃, 120 ℃ were refluxed 6 hours, and were cooled to room temperature.Stir down in the reaction system impouring 40ml frozen water, static spending the night, the solid that leaches is washed with diluted sodium hydroxide solution earlier, wash to neutrality drying again with water, then, with 200 orders～300 order silica gel column chromatographies, get pure product 0.09g, eluent is 60～90 ℃ sherwood oil and an ethyl acetate, volume ratio is 5:1, yield 17.4%.Measure fusing point and ¹H NMR, its chemical structural formula and physical and chemical parameter see Table 3 and table 4.By table 3 and table 4 as seen, this compound ¹H NMR shows and the corresponding chemical shift of its structure that the number of H and its structure are coincide.

Embodiment 5

Synthetic and the structure of compd E-4 is identified

With 0.32g (2mmol) 4-methyl isophthalic acid, 2, the o-methoxybenzoic acid of 3-thiadiazoles-5-formyl hydrazine and 0.30g (2mmol) joins in the 50ml there-necked flask, adds the POCl that 5ml heavily steamed ₃, 120 ℃ were refluxed 4.5 hours, and were cooled to room temperature.Stir down in the reaction system impouring 60ml frozen water, static several minutes, the solid that leaches is washed with diluted sodium hydroxide solution earlier, wash to neutrality drying again with water, then, with 200 orders～300 order silica gel column chromatographies, get pure product 0.24g, eluent is 60～90 ℃ sherwood oil and an ethyl acetate, volume ratio is 2:1, productive rate 44.0%.The mensuration fusing point, ¹H NMR and ultimate analysis, its chemical structural formula and physical and chemical parameter see Table 3 and table 4.By table 3 and table 4 as seen, results of elemental analyses in the limit of error that allows, this compound ¹H NMR shows and the corresponding chemical shift of its structure that the number of H and its structure are coincide.

Embodiment 6

Synthetic and the structure of compd E-6 is identified

With 0.32g (2mmol) 4-methyl isophthalic acid, 2,5-methyl-2-phenyl-2H-[1 of 3-thiadiazoles-5-formyl hydrazine and 0.41g (2mmol), 2,3] triazole-4-formic acid joins in the 50ml there-necked flask, adds the POCl that 10ml heavily steamed ₃, 120 ℃ were refluxed 6 hours, and were cooled to room temperature.With in the reaction system impouring 100ml frozen water, add NaOH under stirring, regulate the pH value to neutral, static, suction filtration, drying, then, with 200 orders～300 order silica gel column chromatographies, get pure product 0.27g, eluent is 60～90 ℃ sherwood oil and an ethyl acetate, and volume ratio is 4:1, yield 41.5%.Measure fusing point and ¹H NMR, its chemical structural formula and physical and chemical parameter see Table 3 and table 4.By table 3 and table 4 as seen, this compound ¹H NMR shows and the corresponding chemical shift of its structure that the number of H and its structure are coincide.

Embodiment 7

Synthetic and the structure of compd E-7 is identified

With 0.32g (2mmol) 4-methyl isophthalic acid, 2, the 6-hydroxy niacin of 3-thiadiazoles-5-formyl hydrazine and 0.28g (2mmol) joins in the 50ml there-necked flask, adds the POCl that 10ml heavily steamed ₃, 120 ℃ were refluxed 6 hours, and were cooled to room temperature, with in the reaction system impouring 100ml frozen water, add NaOH under stirring, regulate the pH value to neutral, static, suction filtration, drying, then, get pure product 0.10g with 200 orders～300 order silica gel column chromatographies, eluent is 60～90 ℃ sherwood oil and an ethyl acetate, and volume ratio is 2:1, productive rate 19.1%.Measure fusing point and ¹H NMR, its chemical structural formula and physical and chemical parameter see Table 3 and table 4.By table 3 and table 4 as seen, this compound ¹H NMR shows and the corresponding chemical shift of its structure that the number of H and its structure are coincide.

Embodiment 8

Synthetic and the structure of compd E-8 is identified

With 0.32g (2mmol) 4-methyl isophthalic acid, 2,1-(4-chloro-phenyl-)-5-n-propyl-1H-pyrazoles-4-formyl chloride of 3-thiadiazoles-5-formyl hydrazine and 0.57g (2mmol) joins in the 50ml there-necked flask, adds the anhydrous THF of 10ml, refluxed 4 hours, and sloughed solvent under the rotary evaporation decompression.In resistates, add 10ml POCl then ₃, 120 ℃ were refluxed the POCl that pressure reducing and steaming is excessive 6 hours ₃Remaining oily matter is poured in the 80ml frozen water, stirs, and uses 20 * 3 dichloromethane extractions then, organic phase is used saturated sodium bicarbonate aqueous solution and washing respectively behind the separatory, suction filtration behind anhydrous sodium sulfate drying is sloughed solvent under the rotary evaporation decompression, with 200 orders～300 order silica gel column chromatographies, get pure product 0.31g, eluent is 60～90 ℃ sherwood oil and an ethyl acetate, and volume ratio is 4:1, productive rate 40.1%.Measure fusing point and ¹H NMR, its chemical structural formula and physical and chemical parameter see Table 3 and table 4.By table 3 and table 4 as seen, this compound ¹H NMR shows and the corresponding chemical shift of its structure that the number of H and its structure are coincide.

Embodiment 9

Synthetic and the structure of compd E-9 is identified

With 0.16g (1mmol) 4-methyl isophthalic acid, 2, the 2-chloro-6-methylnicotinic acid of 3-thiadiazoles-5-formyl hydrazine and 0.17g (1mmol) joins in the 50ml there-necked flask, adds the POCl that 5ml heavily steamed ₃, 120 ℃ were refluxed 6 hours, and were cooled to room temperature.With in the reaction system impouring 100ml frozen water, add NaOH under stirring, regulate the pH value to neutral, static, suction filtration, drying, then, with 200 orders～300 order silica gel column chromatographies, get pure product 0.14g, eluent is 60～90 ℃ sherwood oil and an ethyl acetate, and volume ratio is 2:1, productive rate 47.7%.Measure fusing point and ¹H NMR, its chemical structural formula and physical and chemical parameter see Table 3 and table 4.By table 3 and table 4 as seen, this compound ¹H NMR shows and the corresponding chemical shift of its structure that the number of H and its structure are coincide.

Embodiment 10

Synthetic and the structure of compd E-11 is identified

With 0.32g (2mmol) 4-methyl isophthalic acid, 2, the 6-chlorine apellagrin of 3-thiadiazoles-5-formyl hydrazine and 0.32g (2mmol) joins in the 50ml there-necked flask, adds the POCl that 10ml heavily steamed ₃, 120 ℃ were refluxed 6 hours, and were cooled to room temperature.With in the reaction system impouring 80ml frozen water, add Na under stirring ₂CO ₃, regulate the pH value to neutral, static, suction filtration, drying then, with 200 orders～300 order silica gel column chromatographies, gets pure product 0.08g, and eluent is 60～90 ℃ sherwood oil and an ethyl acetate, and volume ratio is 3:1, productive rate 14.3%.Measure fusing point and ¹H NMR, its chemical structural formula and physical and chemical parameter see Table 3 and table 4.By table 3 and table 4 as seen, this compound ¹H NMR shows and the corresponding chemical shift of its structure that the number of H and its structure are coincide.

Embodiment 11

Synthetic and the structure of compd E-12 is identified

With 0.32g (2mmol) 4-methyl isophthalic acid, 2,5-thiotolene-2-formic acid of 3-thiadiazoles-5-formyl hydrazine and 0.28g (2mmol) joins in the 50ml there-necked flask, adds the POCl that 10ml heavily steamed ₃, 120 ℃ were refluxed 6 hours, and reaction finishes, the POCl that pressure reducing and steaming is excessive ₃With in the resistates impouring 80ml frozen water, stirring makes oily matter become solid, and is static under stirring, suction filtration, dilute sodium hydroxide aqueous solution washing, washing, suction filtration, drying, then, with 200 orders～300 order silica gel column chromatographies, get pure product 0.14g, eluent is 60～90 ℃ sherwood oil and an ethyl acetate, and volume ratio is 3:1, productive rate 26.5%.Measure fusing point and ¹H NMR, its chemical structural formula and physical and chemical parameter see Table 3 and table 4.By table 3 and table 4 as seen, this compound ¹H NMR shows and the corresponding chemical shift of its structure that the number of H and its structure are coincide.

Embodiment 12

Synthetic and the structure of compd E-13 is identified

With 0.47g (3mmol) 4-methyl isophthalic acid, 2, the n-caprylic acid of 3-thiadiazoles-5-formyl hydrazine and 0.43g (3mmol) joins in the 50ml there-necked flask, adds the POCl that 15ml heavily steamed ₃, 120 ℃ were refluxed 6 hours, and reaction finishes, the POCl that pressure reducing and steaming is excessive ₃The back adds the 25ml frozen water, stirs, and adds aqueous sodium hydroxide solution and is neutralized to neutrality, 15 * 2 dichloromethane extractions, washing, the organic phase anhydrous sodium sulfate drying is sloughed solvent under the rotary evaporation decompression, then, with 200 orders～300 order silica gel column chromatographies, get pure product 0.39g, eluent is 60～90 ℃ sherwood oil and an ethyl acetate, volume ratio is 5:1, productive rate 49.2%.Measure fusing point and ¹H NMR, its chemical structural formula and physical and chemical parameter see Table 3 and table 4.By table 3 and table 4 as seen, this compound ¹H NMR shows and the corresponding chemical shift of its structure that the number of H and its structure are coincide.

Embodiment 13

Synthetic and the structure of compd E-14 is identified

With 0.32g (2mmol) 4-methyl isophthalic acid, 2, the styracin of 3-thiadiazoles-5-formyl hydrazine and 0.30g (2mmol) joins in the 50ml there-necked flask, adds the POCl that 10ml heavily steamed ₃, 120 ℃ were refluxed 6 hours, and were cooled to room temperature.With in the reaction system impouring 80ml frozen water, add Na under stirring ₂CO ₃, regulate the pH value to neutral, static, suction filtration, drying then, with 200 orders～300 order silica gel column chromatographies, gets pure product 0.34g, and eluent is 60～90 ℃ sherwood oil and an ethyl acetate, and volume ratio is 3:1, productive rate 62.9%.Measure fusing point and ¹H NMR, its chemical structural formula and physical and chemical parameter see Table 3 and table 4.By table 3 and table 4 as seen, this compound ¹H NMR shows and the corresponding chemical shift of its structure that the number of H and its structure are coincide.

Embodiment 14

Synthetic and the structure of compd E-15 is identified

With 0.47g (3mmol) 4-methyl isophthalic acid, 2, the 4-methyl isophthalic acid of 3-thiadiazoles-5-formyl hydrazine and 0.43g (3mmol), 2,3-thiadiazoles-5-formic acid joins in the 50ml there-necked flask, adds the POCl that 15ml heavily steamed ₃, 120 ℃ were refluxed 6 hours, and reaction finishes, the POCl that pressure reducing and steaming is excessive ₃, with in the resistates impouring 80ml frozen water, add saturated sodium bicarbonate aqueous solution under stirring, regulate the pH value to neutral, static, suction filtration, drying, then, with 200 orders～300 order silica gel column chromatographies, get pure product 0.32g, eluent is 60～90 ℃ sherwood oil and an ethyl acetate, volume ratio is 4: 1, productive rate 40.2%.The mensuration fusing point, ¹H NMR and ultimate analysis, its chemical structural formula and physical and chemical parameter see Table 3 and table 4.By table 3 and table 4 as seen, results of elemental analyses in the limit of error that allows, this compound ¹H NMR shows and the corresponding chemical shift of its structure that the number of H and its structure are coincide.

Embodiment 15

Synthetic and the structure of compd E-16 is identified

With 0.32g (2mmol) 4-methyl isophthalic acid, 2, furans-2-formic acid of 3-thiadiazoles-5-formyl hydrazine and 0.22g (2mmol) joins in the 50ml there-necked flask, adds the POCl that 10ml heavily steamed ₃, 120 ℃ were refluxed 6 hours, and reaction finishes, the POCl that pressure reducing and steaming is excessive ₃, with in the resistates impouring 80ml frozen water, add saturated sodium bicarbonate aqueous solution under stirring, regulate the pH value to neutral, static, suction filtration, drying.Then, with 200 orders-300 order silica gel column chromatography, get pure product 0.17g, eluent is 60-90 ℃ sherwood oil and an ethyl acetate, and volume ratio is 3:1, productive rate 36.7%.Measure fusing point and ¹H NMR, its chemical structural formula and physical and chemical parameter see Table 3 and table 4.By table 3 and table 4 as seen, this compound ¹H NMR shows and the corresponding chemical shift of its structure that the number of H and its structure are coincide.

Embodiment 16

Synthetic and the structure of compd E-18 is identified

With 0.32g (2mmol) 4-methyl isophthalic acid, 2, the 1-methyl of 3-thiadiazoles-5-formyl hydrazine and 0.31g (2mmol)-5-ethyl pyrazoles-3-formic acid joins in the 50ml there-necked flask, adds the POCl that 10ml heavily steamed ₃, 120 ℃ were refluxed 6 hours, and reaction finishes, the POCl that pressure reducing and steaming is excessive ₃, with in the resistates impouring 80ml frozen water, add saturated sodium bicarbonate aqueous solution under stirring, regulate the pH value to neutral, static, suction filtration, drying.Then, with 200 orders-300 order silica gel column chromatography, get pure product 0.28g, eluent is 60-90 ℃ sherwood oil and an ethyl acetate, and volume ratio is 1:1, productive rate 39.5%.Measure fusing point and ¹H NMR, its chemical structural formula and physical and chemical parameter see Table 3 and table 4.By table 3 and table 4 as seen, this compound ¹H NMR shows and the corresponding chemical shift of its structure that the number of H and its structure are coincide.

Embodiment 17

Novel 2-of the present invention (4 '-methyl isophthalic acid ', 2 ', 3 '-thiadiazoles-5 '-)-5-replacement-1,3, the bacteriostatic activity of 4-oxadiazole derivative:

The title and the code name of the frequently seen plants pathogenic fungi of the present invention's test see Table 5, and by table 5 as seen, these bacterial classifications have good representativeness.Thalli growth rate method measurement result sees Table 6, table 6 shows, synthetic majority of compounds of the present invention all has bacteriostatic action in various degree to the growth of most of pathogenic fungi of mensuration: when 50 μ g/ml, E1 is 56.0% to the inhibiting rate of Sclerotinia sclerotiorum, is 67.9% to the inhibiting rate of miliary damping-off; E2 is 58.3% to the inhibiting rate of ring rot of apple bacterium.

Embodiment 18

Novel 2-(4 '-methyl isophthalic acid ', 2 ', 3 '-thiadiazoles-5 '-)-5-replaces-1,3, and 4-oxadiazole derivative is to the effect of wheat leaf rust:

The physical and chemical parameter of table 3 The compounds of this invention

Table 4 The compounds of this invention ¹H NMR data

Numbering	1H NMR δ (solvent C DCl 3)
		E-1	2.40(3H，s，CH 3)，3.10(3H，s，thiadiazole-CH 3)，7.29～7.32(2H，d，J＝8.0Hz，benzene-H)，7.94～7.96(2H.d，J＝8.3Hz，benzene-H)
E-2	3.16(3H，s，thiadiazole-CH 3)，3.91(3H，s，-OCH 3)，7.05～7.08(2H，d，J＝8.9Hz，CH＝CH)，8.06～8.09(2H.d.J＝8.9Hz，CH＝CH)
		E-3	2.48(3H，s，CH 3)，3.17(3H，s，thiadaizole-CH 3)，7.40～7.46(2H，m，benzene-H)，7.91～7.98(2H，m，benzene-H)
E-4	3.16(3H，s，thiadiazole-CH 3)，4.01(3H，s，-OCH 3)，7.09～7.16(3H，m，benzene-H)，7.56～7.61(1H，t，J＝8.3Hz，benzene-H)，8.04～8.07 (1H，d，J＝7.7Hz，benzene-H)
		E-6	2.79(3H，s，CH 3)，3.20(3H，s，thiadiazole-CH 3)，7，52～7.57(3H，m，benzene-H)8.14～8.17(2H，d，J＝8.3Hz)
E-7	3.17(3H，s，thiadiazole-CH 3)，7.56～7.59(3H，d，J＝8.4Hz，pyridinone-H).8.37～8.41(1H，d，J＝8.4Hz，pyridinone-H)，9.13(1H.s， pyridinone-H)
		E-8	0.90～0.95(3H，t，J＝7.3Hz，CH 3)，1.62～1.69(2H，q，J＝7.5Hz，CH 2)，3.05～3.10(2H，t，J＝7.8Hz.CH 2)，7.40～7.43(2H.d，J＝8.7Hz，ben- zene-H)，7.52～7.55(2H，d，J＝8.5Hz，benzene-H)，8.15(1H，s，pyrazole-H)
E-9	2.68(3H，s，CH 3)，3.18(3H，s，thiadiazole-CH 3)，7.32～7.34(1H，d，J＝7.9Hz，Benzene-H)，8.36～8.39(1H，d，J＝7.9Hz，benzene-H)
		E-11	3，18(3H，s，CH 3)，7.56～7.58(1H，d，J＝8.4Hz，pyridine-H)，8.37～8.41(1H，q，J＝8.4Hz，pyridine-H)，9.12～9.13(1H，d，J＝2.4Hz)
E-12	2.60(3H，s，CH 3)，3.14(3H，s，CH 3)，6.88～6.89(1H，d，J＝3.7Hz，H-thiophene).7.67～7.68(1H，d，J＝3.7Hz，H-thiophene)
		E-13	0.87～0.91(3H，t，J＝6.7Hz，CH 3)，1.30～1.43(8H，m，-(CH 2) 4-)，1.81～1.91(2H，m，CH 2)，2.93～2.98(2H，t.J＝＝7.5Hz)，3.09(3H，s.CH 3)
E-14	3.16(3H，s，CH 3)，7.08～7.14(1H，d，J＝16.4Hz，CH＝CH)，7.44～7.46(3H，m，benzene-H)，7.60～7.63(2H，m.benzene-H)，7.65～7.70 (1H，d，J＝16.4Hz，CH＝CH)
		E-15	3.17(6H，s，thiadiazole-CH 3)
E-16	3.14(3H，s，CH 3)，6.66-6.67(1H，q，J＝1.8Hz，H-thiophene).7.31-7.32(1H.d，，J＝3.5Hz，H-thiophene)，7.72(1H，d，J＝1.6HzH-thio- phene)
		E-18	1.32～1.38(3H，t，J＝7.5Hz，CH 3)，2.67～2.74(2H，d，J＝7.5Hz，CH 2)，3.16(3H，s，thiadiazole-CH 3)，3.93(3H.s，-N-CH 3)，6.79(1H，s，H- pyrazole)

Code name of the plant pathogenic fungi of the test among table 5 the present invention and title

(data are the inhibition percentage/%) to pathogenic bacteria growth to the fungicidal activity of the compound among table 6 the present invention in the table

The test code name	Szg -b	E-2- a	E-2- b	E-2- c	E-3- b	E-4- a	E-6	E-8	E-8- b	E-9- a	E-11	E-12	E-13 -a	E-13 -b	E-14	E-15 -b
																	The structure code name	E-1		E-2		E-3	E-4	E-6	E-8	E-8	E-9	E-11	E-12	E-13		E-14	E-15
μg/ml	50	50	50	50	50	50	50	50	50	50	50	50	50	50	50	50
																	AC	67.9	0	0	0	0	0	0	0	0	22.2	13.3	0	26.6	0	0	0
AE	ND	0	0	0	0	0	0	0	0	0	0	0	0	31.6	23.7	0
																	AJ	ND	ND	0	ND	ND	20	ND	ND	ND	30.0	ND	ND	100	ND	20	ND
B	ND	0	0	0	24.1	17.2	0	31.0	0	17.2	12.5	21.1	21.1	31.6	21.1	21.1
																	C	ND	0	0	0	0	0	0	0	0	0	18.8	31.3	12.5	18.8	36.3	31.3
D	ND	17.6	17.6	17.6	23.5	17.6	17.6	41.2	41.2	23.5	0	9	0	0	27.3	13.6
																	F	18.4	17.6	11.7	0	0	11.7	17.6	17.6	29.4	0	23.7	36.8	31.6	36.8	31.6	44.7
G	ND	37.9	31.0	13.8	24.1	31.0	31.0	48.3	41.4	31.0	10.5	21.1	342	13.2	36.8	31.6
																	I	ND	33.3	58.3	0	47.2	33.3	44.4	44.4	55.5	38.9	47.6	39.7	25.4	38.1	46	38.1
J	ND	29.4	29.4	11.7	0	0	0	0	17.6	17.6	0	0	0	0	0	0
																	L	2.1	31.0	13.8	17.2	37.9	13.8	41.4	31.0	17.2	17.2	0	0	0	0	0	0
N	56.0	235	29.4	41.2	23.5	23.5	23.5	23.5	29.4	0	32.1	40.5	32.1	0	0	32.1
																	O	ND	37.9	13.8	31.0	41.4	27.6	31.0	27.6	13.8	24.1	38.9	38.9	38.9	49.2	0	0
Q	ND	47.2	44.4	38.9	47.2	41.2	22.2	19.4	33.3	22.2	41.4	0	0	0	20.3	0
																	R	ND	29.4	11.7	0	0	0	0	0	0	0	0	13.8	42.1	0	13.8	13.8
RC	ND	31.0	17.2	13.8	37.9	13.8	37.9	31.0	41.4	13.8	38.5	0	0	19.3	0	0
																	U	ND	0	0	0	0	0	0	0	0	0	27.1	27.1	0	0	0	0
V	ND	0	0	0	0	0	0	0	0	0	0	0	0	0	13.8	0

ND: undetermined

What biological assay was tested the results are shown in Table 6, table 6 shows, the part [1 that the present invention finds, 2,3] thiadiazoles derivative has certain fungicidal activity or bacteriostatic activity to wheat leaf rust, wherein E-13-a is 100% to the inhibiting rate of wheat leaf rust, and its fungicidal activity is not as good as commercial contrast medicament m-tetrachlorophthalodinitrile, but this is to find that first this compounds that contains the oxadiazole structural unit has the growth-inhibiting effect to wheat leaf rust.

Embodiment 19

Novel 2-of the present invention (4 '-methyl isophthalic acid ', 2 ', 3 '-thiadiazoles-5 '-)-5-replacement-1,3, the effect of the derivative induced tobacco resisting tobacco mosaic virus of 4-oxadiazole:

What biological assay was tested the results are shown in Table 7, table 7 shows, the plant inducing anti-disease activator BTH of standard and tiadinil and of the present invention [1,2,3] thiadiazoles derivative under isolated condition to TMV unrestraint effect, but BTH can evoking tobacco produces the resistance to TMV, and tiadinil also can evoking tobacco produces the resistance to TMV, but effect is poor than BTH; Major part of the present invention [1,2,3] thiadiazoles derivative does not have the activity of the anti-TMV of evoking tobacco.

The activity of the compound evoking tobacco resisting tobacco mosaic virus among table 7 the present invention

The medicament title	Concentration μ g/mL	Antiviral effect % exsomatizes	Concentration μ g/mL	Blade face inducing anti-disease toxic effect fruit %
					BTH	100	0	100	95
TDL	500	0	500	50
					E-1	500	Not detected	500	Not detected
E-2	500	Not detected	500	Not detected
					E-3	500	Not detected	500	Not detected
E-4	500	Not detected	500	Not detected
					E-6	500	Not detected	500	Not detected
E-7	500	Not detected	500	Not detected
					E-8	500	Not detected	500	Not detected
E-9	500	Not detected	500	Not detected
					E-11	500	Not detected	500	Not detected
E-12	500	Not detected	500	Not detected
					E-13	500	0	500	0
E-14	500	0	500	0
					E-15	500	Not detected	500	Not detected
E-16	500	Not detected	500	Not detected
					E-17	500	0	500	20
E-18	500	0	500	20

Annotate: data are average results of 3 experiments in the table

Claims (6)

1. nitrogenous sulfur heterocyclic compound 1,2, the 3-thiadiazoles derivative is characterized in that having the general formula that I represents:

Wherein: R is respectively 4-aminomethyl phenyl, 4-p-methoxy-phenyl, 3-aminomethyl phenyl, 2-p-methoxy-phenyl, 4-methyl-2-phenyl-2H-1,2,3-triazole-5-base, pyridine-2 (1H)-ketone-5-base, 1-(4-chloro-phenyl-)-5-n-propyl-1H-pyrazoles-4-base, 2-chloro-6-picoline-3-base, 2-chloropyridine-5-base, 2-thiotolene-5-base, n-heptyl, 1-phenyl ethene-2-base, 4-methyl isophthalic acid, 2,3-thiadiazoles-5-base, furans-2-base or 1-methyl-5-ethyl-1H-pyrazole-3-yl;

The chemical structural formula of each compound is respectively:

2. the described nitrogenous sulfur heterocyclic compound 1,2 of claim 1, the synthetic method of 3-thiadiazoles derivative I is characterized in that total synthetic route is:

Wherein: R is respectively 4-aminomethyl phenyl, 4-p-methoxy-phenyl, 3-aminomethyl phenyl, 2-p-methoxy-phenyl, 4-methyl-2-phenyl-2H-1,2,3-triazole-5-base, pyridine-2 (1H)-ketone-5-base, 1-(4-chloro-phenyl-)-5-n-propyl-1H-pyrazoles-4-base, 2-chloro-6-picoline-3-base, 2-chloropyridine-5-base, 2-thiotolene-5-base, n-heptyl, 1-phenyl ethene-2-base, 4-methyl isophthalic acid, 2,3-thiadiazoles-5-base, furans-2-base or 1-methyl-5-ethyl-1H-pyrazole-3-yl;

Specifically be divided into following steps:

A.4-methyl isophthalic acid, 2, the preparation of 3-thiadiazoles-5-formyl hydrazine:

With 6.9 gram 4-methyl isophthalic acids, 2,3-thiadiazoles-5-ethyl formate and 44 mmole hydrazine hydrates join in 50 milliliters of there-necked flasks, reflux 10 hours, stirred overnight at room temperature then, reaction system yellowly solid, add the intact ester of 40 milliliters of sherwood oil flush away unreacteds, suction filtration, dry that yellow solid 4.9 restrains, yield 77.5%, the consumption of this compound enlarges in proportion or dwindles;

B. nitrogenous sulfur heterocyclic compound 1,2, the preparation method one of 3-thiadiazoles derivative I:

In 100 milliliters of there-necked flasks, add 5 mmole 4-methyl isophthalic acids, 2,3-thiadiazoles-5-formyl hydrazine and equimolar substituted carboxylic acid and 7.5 milliliters of POCl that heavily steamed ₃, 120 ℃ were refluxed 4～6 hours, and were cooled to room temperature, with in 80 milliliters of frozen water of reaction system impouring, standing over night is washed the solid that leaches earlier with diluted sodium hydroxide solution under stirring, wash with water again to neutrality, drying then, gets pure product with 200 orders～300 order silica gel column chromatographies, eluent is 60～90 ℃ sherwood oil and an ethyl acetate, according to the difference of product, volume ratio is certain ratio of selecting between 2:1～5:1, mensuration product fusing point, ¹H NMR and ultimate analysis physical and chemical parameter, the consumption of this compound enlarges by corresponding proportion or dwindles;

Above-mentioned substituted carboxylic acid is meant: 4-tolyl acid, 4-methoxybenzoic acid, 3-tolyl acid, O-Anisic Acid, 4-methyl-2-phenyl-2H-1,2,3-triazole-5-formic acid, pyridine-2 (1H)-ketone-5-formic acid, 1-(4-chloro-phenyl-)-5-n-propyl-1H-pyrazoles-4-formic acid, 2-chloro-6-picoline-3-formic acid, 2-chloropyridine-5-formic acid, 2-thiotolene-5-formic acid, n-caprylic acid, 3-phenylacrylic acid, 4-methyl isophthalic acid, 2,3-thiadiazoles-5-formic acid, furans-2-formic acid or 1-methyl-5-ethyl-1H-pyrazoles-3-formic acid;

C. nitrogenous sulfur heterocyclic compound 1,2, the preparation method two of 3-thiadiazoles derivative I:

In 100 milliliters of there-necked flasks, add 5 mmole 4-methyl isophthalic acids, 2,3-thiadiazoles-5-formyl hydrazine and equimolar replacement acyl chlorides and 10 milliliters of anhydrous THF, refluxed 4～6 hours, be cooled to room temperature, slough solvent under the rotary evaporation decompression, in resistates, add 10 milliliters of POCl then ₃, 120 ℃ were refluxed the POCl that pressure reducing and steaming is excessive 6 hours ₃Be cooled to room temperature, stir down in the 80 milliliters of frozen water of thing impouring with the remnants of reaction system, fully stir, use 20 * 3 dichloromethane extractions then, organic phase is used saturated sodium bicarbonate aqueous solution and washing respectively behind the separatory, suction filtration behind anhydrous sodium sulfate drying, slough solvent under the rotary evaporation decompression, then, get pure product with 200 orders～300 order silica gel column chromatographies, eluent is 60～90 ℃ sherwood oil and an ethyl acetate, according to the difference of product, volume ratio is certain ratio of selecting between 2:1～5:1, mensuration product fusing point, ¹H NMR and ultimate analysis physical and chemical parameter, the consumption of this compound enlarges by corresponding proportion or dwindles;

Above-mentioned replacement acyl chlorides is meant: the 4-methyl benzoyl chloride, the 4-methoxy benzoyl chloride, the 3-methyl benzoyl chloride, the 2-methoxy benzoyl chloride, 4-methyl-2-phenyl-2H-1,2,3-triazole-5-formyl chloride, pyridine-2 (1H)-ketone-5-formyl chloride, 1-(4-chloro-phenyl-)-5-n-propyl-1H-pyrazoles-4-formyl chloride, 2-chloro-6-picoline-3-formyl chloride, 2-chloropyridine-5-formyl chloride, 2-thiotolene-5-formyl chloride, positive capryl(yl)chloride, the 3-phenylacrylyl chloride, the 4-methyl isophthalic acid, 2,3-thiadiazoles-5-formyl chloride, furans-2-formyl chloride or 1-methyl-5-ethyl-1H-pyrazoles-3-formyl chloride.

3. the described nitrogenous sulfur heterocyclic compound 1,2 of claim 1, the bioactive screening method of 3-thiadiazoles derivative, concrete operation method is as follows:

A. the described nitrogenous sulfur heterocyclic compound 1,2 of claim 1,3-thiadiazoles derivative are to the mensuration of pathogenic fungi growth activity influence:

Adopt thalli growth rate assay method, detailed process is, get 5 milligrams of sample dissolution in an amount of dimethyl formamide, then with containing the medicament that a certain amount of polysorbas20 emulsifier aqueous solution is diluted to 500 mcg/ml, reagent agent is respectively drawn under aseptic condition in 1 milliliter or the 0.5 milliliter of injection culture dish, add 9 milliliters or 9.5 milliliters of substratum more respectively, make 50 mcg/ml or 25 mcg/ml pastille flat boards after shaking up, do blank with the flat board that adds 1 milliliter of aqua sterilisa, punch tool with 4 millimeters of diameters cuts the bacterium dish along the mycelia outer rim, move on the pastille flat board, be equilateral triangle and put, every processing repeats 3 times, culture dish is placed on cultivation in 24 ± 1 ℃ of constant incubators, " Invest, Then Investigate " was respectively handled bacterium dish expansion diameter in 48 hours, averaged, and relatively calculated relative bacteriostasis rate with blank; Comprise gibberella saubinetii (Gibberella zeae), tomato early epidemic disease (Alternaria), asparagus stem withered (Phoma asparagi solani), apple wheel line (Physalospora piricola) and peanut foxiness (Cercospora arachidicola) for the examination pathogenic fungi;

B. the described nitrogenous sulfur heterocyclic compound 1,2 of claim 1,3-thiadiazoles derivative are to the mensuration of wheat leaf rust growth activity influence:

The described nitrogenous sulfur heterocyclic compound 1 of claim 1,2, the 3-thiadiazoles derivative is as follows to the measuring method of the fungicidal activity of wheat leaf rust (Urediospore ofpuccinia.recondita Rob.ex Desm.f.sp.puccinia triticina Eriks) or bacteriostatic activity:

Adopt live body plant method, detailed process is, with selected susceptible seed, soaked 4 hours with tap water, clean up, place 28 ℃ of constant temperature to break bud 24 hours, sowing when wheat seedling grows to 1 leaf, 1 heart, promptly can be used for experiment, standby wheat seedling is sprayed water earlier, spray spore powder immediately, the frame of will preserving moisture covers completely with plastic cloth, 20 ± 2 ℃ of controlled temperature, humidity is RH more than 90%, preserves moisture 24 hours; The wheat leaf blade of preserving moisture is sprayed compound to be measured, when contrast was fully fallen ill, the vaned sorus number of inquiry agency calculated each processing, comprise the average sorus number of leaf of blank, be calculated as follows out the inhibition effect of test compound wheat leaf rust:

$E=\frac{\mathrm{CK}-T}{\mathrm{CK}}\×100$

Wherein: E is relative effect, unit: %

CK is the average sorus number of blank leaf, unit: heap

T is the average sorus number of treatment group, unit: heap;

C. the described nitrogenous sulfur heterocyclic compound 1,2 of claim 1, the mensuration of 3-thiadiazoles derivative inducing anti-disease activity:

The described nitrogenous sulfur heterocyclic compound 1,2 of claim 1, the screening method of 3-thiadiazoles derivative evoking tobacco activity of resisting tobacco mosaic virus is as follows:

I. the selection of standard plant inducing anti-disease activator: selecting tiadinil and diazosulfide is the plant inducing anti-disease activator of standard, the vitro Screening of all compounds adopts 500 mcg/ml, the mensuration of diazosulfide induced activity adopts 100 mcg/ml, is 50% Bion 50% WG preparation by purity; The mensuration of tiadinil induced activity adopts 500 mcg/ml, is prepared greater than 99.5% tiadinil by purity, and the described compound of claim 1 adopts 500 mcg/ml;

II. the screening method of compound evoking tobacco activity of resisting tobacco mosaic virus: the mensuration of the direct antiviral activity that exsomatizes adopts half page of method to carry out; It is common cigarette with the seedling age unanimity that live body is induced, 3 basins are one group, cigarette seedling respectively at inoculation pre-treatment in preceding 7 days, processing mode comprises: spray test compound solution 2 to 3 times, each 20 milliliters, the 7th day frictional inoculation tobacco mosaic virus (TMV) on the tobacco leaf that newly grows, place its growth optimal temperature and the following cultivation of illumination after 3 days the cigarette seedling, check incidence, comprehensive scab number is calculated as follows out the inducing anti-disease toxic effect fruit of test compound to tobacco mosaic virus (TMV), 3 repetitions are established in each processing, and contrast divides blank and standard chemicals treatment to contrast 2 kinds; The relative effect of test compounds is divided into 4 grades: A, B, C, D, concrete data are the A level: induce effect〉70%, for excellent; B level: induce effect 70～50%, for very; C level: induce effect 30～50%, for poor; D level: induce effect＜30% to be considered as not having and induce effect:

$R=\frac{\mathrm{CK}-I}{\mathrm{CK}}\×100$

Wherein, R is the induce effect of compound to the tobacco resisting tobacco mosaic virus, unit: %

CK is the average withered spot number of clear water contrast blade, unit: individual

I is for inducing the average withered spot number of handling rear blade, unit: individual through compound.

4. the described nitrogenous sulfur heterocyclic compound 1,2 of claim 1, the purposes of 3-thiadiazoles derivative in preparation plant pathogenic fungi growth inhibitor.

5. the described nitrogenous sulfur heterocyclic compound 1,2 of claim 1, the application of 3-thiadiazoles derivative in preparation wheat leaf rust growth inhibitor.

6. the described nitrogenous sulfur heterocyclic compound 1,2 of claim 1, the purposes of 3-thiadiazoles derivative in preparation evoking tobacco resisting tobacco mosaic virus medicament.