SU549126A1 - Sexual attractant - Google Patents

Description

(54) GERMAN ATTRACTANT

one

The invention relates to the field of plant protection, in particular, to baits for the control of harmful insects, and is included in the group of epoxides of the general formula:

si -sn- (sn, ..- dn-ss-n

i h / f-m-fi

SNO

The use of sexual attractant-disparlur (2-methyl-cis-7,8-epoxy-octadecane) is known for the supervision of unpaired alumina (Pofthethiot diSpan b. 1,

It is known that dysparlur also attracts males of silk monkey da Pora (PohiheiHor monachal LI.) 2.

The disadvantage of disparlor is its expensive and complex synthesis.

The purpose of the invention is to obtain a compound that would be less effective, but more simple to produce and less expensive.

As a sex attractant for male nursing males, it is proposed to use an epoxide of the formula;

CH3-CH- (CH,) 3-CH-CH-C, H „

(2 methyl-cis-6,7-9Poxyheptadecane).

This substance is simpler than dispersar, because it contains less by one methyl group. For its synthesis, isohexyl bromide is used as a starting compound, which is cheaper than isoheptyl bromide, which is necessary for the synthesis of disparurum.

A sample of 2-methyl-cis-6,7-epoxyheptadecane was prepared as follows. To a suspension of lithium amide, prepared from 0.4 g of lithium in 4O ml of hexamethyltriamide phosphoric acid, was added 8.3 g of dodedin -1, transferred 1.5 hours at 35 ° C, the mixture was cooled and added dropwise to it

8.25 g of isohexyl bromide at such a rate that the temperature did not rise above 36 C. After the mixture was stirred for 3 hours at 36 ° C, decomposed with water, extracted with ether, the extract was washed

With a 10% hydrochloric acid solution, then with water, no No j, S04 j was evaporated and the residue was distilled. 4.2 g (32%) of the product was obtained. After that, 1.6 g of 2-methyl-6-heptadecin was hydrogenated over 68 mg

Lindlar catalyst in 15 ml of hexane. Controlled hydrogenation by gas chromatography. After hydrogenation, the catalyst was filtered, the hexane was evaporated, the residue was treated with excess mono-naphthalic acid in 250 ml of chloroform. The solution was left for 5 hours at 2–25 ° C, the phthalic acid precipitated was filtered, the solvent was evaporated, the residue was filtered through a layer of silica gel, washed with hexane, again evaporated to obtain 1.3 g (8O%) 2-methyl-cis-6.7 epoxygept dean. The boiling point of the substance is 12,130 ° C (0.8 we) 1.4460. Found,%: C 80.44; H 13.46; 15 calculated,%; C 80.55; H 13.51. Attractiveness for males and dysplur (as observed for 4 days).

Claims (1)

The formula is: CH3-CH- (CHj3-CH-CH-C, oH ,. sn, about popat attractant for male silk damoyashenkn. Sources of information taken into account in the examination: l.Bier-E elaO.J-Ecott.Ewtoitiofi. , 1972, 65, No. 3,659-664. 2.5kuhpavy etaS.Pffiattzen UwweBtSchuta, 1974, 47,59-62 (prototype). The attractiveness of 2-methyl-cis-6,7-epoxy-heptadecane for male nuns was compared with that of disparlor when testing both substances in glue traps in nature (see table). As can be seen from the table, both substances have the same attractiveness for male nuns (a slight excess of the catch by 2-methyl-cis-6,7-epoxyheptadecane over the catch on disparly was not statistically confirmed in the experiment), since 7-epoxyheptadecane is cheaper than dysparlur, its use for the supervision of the silk nun-nursing house and for the control of it will provide cost savings. 2-methyl-cis-6,7-epoxyheptadecane nuns for 10 traps with each bait