Means for presowing treatment of seeds

 

(57) Abstract:

Describes the new esters of phosphorus acids of General formula (1A-d), where n= 1, R1= CH2R= C2H5(a); R1= CH2CH2R= l2CH2(b); R1= n-C6H4CH2, R= CH3(in)2H5(g); n= 2, R1= CH2, R= CH2CH= CH2(d) that are used for presowing treatment of seeds. The technical result consists in increasing the germination energy and germination soaking seeds of radish, peas, and cucumbers in an aqueous solution of esters of phosphorus acids. 1 PL.

The invention relates to agriculture, namely, to means for presowing treatment of seeds on the basis of organic compounds.

Among the organophosphorus compounds known to be used for presowing treatment of seeds of phytin, which is a natural complex of calcium, magnesium and potassium salts of various inozitfosfornah acids, mainly insidestory acid for presowing treatment of seeds of spring wheat and spring barley (ed. St. N 812256, M CL3A 01 N 57/00, 1981 ).

Known use as b is otci seed cotton (ed. St. N 1138098, class A 01 N 57/10: A 01 C 1/00, 1985 ).

Known application-chlorhexidene acid as a regulator of the growth of potato plants (ed. St. N 1045877, class A 01 N 57/12, 1983 ).

Known use as a pre-sowing treatment of seeds of the plant growth regulator - oligomer, which represents an organophosphorus compound (ed. St. N 1792610, class A 01 N 57/10, C 08 G 79/02).

However, the known drugs are used to treat a limited range of agricultural crops.

The invention is directed to a tool for presowing treatment of seeds, expanding the range of tools for this purpose.

This is achieved by the use of esters of phosphorus acids of General formula

< / BR>
where n= 1, R'= CH2R= C2H5(a);

R'= CH2CH2R= ClCH2CH2(b);

R'= n-C6H4CH2R= CH3(b)

C5H5(g);

n= 2, R'= CH2R= CH2CH= CH2(d)

as a means for presowing treatment of seeds.

Esters of phosphorus acids (I and d) was prepared as follows.

Example 1. Diethoxyphosphoryloxy-1-methyl-2,2 - dichlorocyclopentane (Ia). The mixture is stirred at a temperature of 70oC for 2-3 h To highlight the target product and the removal of side connections to chilled to a temperature of 25oC the reaction mixture was added 0.1 mol of diethyl ether and 0.2 mol of water. The output of the selected product is 88%, d4201,2565, nD201,4559. Found, %: Cl 22,03, P 9,52. C10H17Cl2O5P. Calculated, %: Cl 22,22, P 9,71. An NMR spectrum31Pp19 M. D. IR spectrum ( cm-1): 3090, 1715 (C= O), 1220, 1185, 1100, 1060, 1030, 980 (POC).

Example 2. Di(2-chlorethoxyfos)ethyl-1-methyl-2,2 - dichlorocyclopentane-Silat (IB).

Analogously to example 1 instead diethylphosphonate use three(2-chloroethyl)phosphonate. The yield of the target product is 73%, d4201,2035, nD201,4889. Found, %: Cl 35,49, P 7,43, C11H17Cl4O5P. Calculated, %: Cl Of 35.27, P 7,70. An NMR spectrum31Pp28 M. D. IR spectrum (cm-1): 3090, 1715 (C= O), 1250 (P= O), 1220, 1185, 1090, 1030, (POC),

Example 3. 4-Dimethoxyphosphinyl-1-methyl-2.2 - dichlorocyclopentane (1).

Analogously to example 1 instead diethylphosphonate use dimethyl-4 - chloromethylphosphonate. The yield of the target product 90%, nD201,4988. Found, %: Cl 19,05, P 8,23. C14H17Cl2O5P. ethoxymethylene-1-methyl-2,2 - dichlorocyclopentane (1 g).

Analogously to example 1 instead diethylphosphonate use diethyl-4 - chloromethylphosphonate. The yield of the target product 95%, d4201,2353, nD201,5181. Found, %: Cl 17.58, P 7.52. C16H21Cl2O5P. Calculated, %: Cl 17,94, P 7,84. An NMR spectrum31Pp20,6 M. D. IR spectrum (cm-1): 3090, 1720 (C= O), 1255 (P= O), 1170, 1030, 1060, 1030, 975 (POC).

Example 5. Allyl bis(1-methyl-2,2 - dichlorocarbanilide)phosphinate (Ia).

Analogously to example 1 instead diethylphosphonate use allylchloroformate. The yield of the desired product in 87%, d4201,3143, nD201,4872. Found, %: Cl 14,88, P 6,34. C15H19Cl4O6P. Calculated, %: Cl Br15.15, P 6,62. An NMR spectrum31Pp44 M. D. IR spectrum (cm-1): 3095, 1715 (C= O), 1640 (C= O), 1260 (P= O), 1205, 1180, 1095, 1030, 905 (POC).

The proposed action of the drugs was tested on seeds of radish varieties of "Heat", peas and zucchini varieties "Gribovskaya." Seeds were germinated in Petri dishes in an aqueous solution of ether acids of phosphorus and oligomer on author. St. N 1792610 relevant concentrations. Seeds were germinated in an incubator at a temperature of 22-25oC on filter paper with a fourfold repetition. Definition wide-angle determine the germination". The results of the vigor and laboratory germination of seeds is given in table. 1.

The table shows that soaking seeds of radish, peas, zucchini in an aqueous solution of esters of phosphorus acids germination is increased by 3-20%, and germination 1.5 - 28%.

Esters of phosphorus acids of General formula

< / BR>
where n = 1, R1= CH2R = C2H5(a);

R1= CH2CH2R = Cl2CH2(b);

R1= n-CH6H4CH2, R = CH3(in);

WITH2H5(g);

n = 2, R1= CH2, R = CH2CH = CH2(d)

as a means for presowing treatment of seeds.

 

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