The proceeding of obyaining the isomer mixture of synthetic pyrotroizi (piretroizi)

• Main Authors: SZABOLCSI Tamas, GAJARI Antal, ZOLTAN Sandor, BOTAR Sandor, NAGY Lajos, HEGEDUS Ágnes, HIDASI Gyorgy, SOMFAI EVA, PAP Laszlo, BERTOK Bela, SZEKELY Istvan, SOOS Rudolf, RADVANY Erzsebet
• Format: Patent
• Language: English; Romanian; Russian
• Published: 31.01.1995
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; AGRICULTURE; ANIMAL HUSBANDRY; APPARATUS THEREFOR; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES; CHEMISTRY; FISHING; FORESTRY; GENERAL METHODS OF ORGANIC CHEMISTRY; HUMAN NECESSITIES; HUNTING; METALLURGY; ORGANIC CHEMISTRY; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS; PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF; TRAPPING

The procceding of obtaining the isomer mixture of synthetic pyrotroizi (piretroizi)The use: in agriculture, because it manifests insecticide activity. The summary: the method of obtaining the new isomer mixture of synthetic pyrotroizi with the general formula:X2C =CH - COOCH(CN) - C6H4OC6H5where X1 chlorine, bromine that contains at least 95% mass of the enantiomeric pairs IR cis S, IS cis R (a), IR trans S and IS trans R (b) into a mass report from 55:45 till 25:75.The efficiency constitues 70-80% of the product.The melting temperature of the product, the mass report of the isomer 1a:1b is 55:45, 50:50, 40:60, 30:70, 25:75, is equal with 61,5 - 64, 60,5-62, 63,5-65, 65-68, 67-71,5°C. In the melted mass or in the saturated solution of mixter of the enantiomeric pairs IR cis S, IS cis R (1a) and IR trans S, IS trans R (ab) and IR cis R, IS cis S (1c), IR trans R, IS trans S (1b) in primary alcohol or a mixture of haloid hydrocarbon saturated and primary and with primary alkylek ether so as oil-bearing ether or hexane. For initiation crystals are added and the crystallization is made at the temperature from (+) 30 till (-) 10°C with the further separation at the indicated temperature of the pair enantiomerik crystals that contain 1a and 1b. Utilizarea în agricultură, deoarece manifestă activitate insecticidă. Esenţa procedeu de obţinere a amestecului nou de izomeri piretroizi sintetici cu formula generală:X2C=CH-COOCH(CN) - C6H4OC6H5,în care X2 reprezintă clor, brom care conţin cel puţin 95% de masă a perechilor enantiomerice IR cis S, IS cis (a), R travs S şi IS trans R(b) într-un raport de masă de la 55:45 până la 25:75. Randamentul constituie 70-80% de produs. Temperatura de topire a produsului, raportul de masă a izomerilor la 1a:1b fiind 55:45, 50:50, 40:60, 30:70, 25:75, este egală respectiv cu 61,5-64, 60,5-62, 63,5-65, 65-668, 67-71,5°C. În masa topită sau în soluţia saturată de amestec a perechilor enantiomerice IR cis S, IS cis R (1a) şi IR trans S, IS trans R (1b) şi IR cis R, IS cis S (1c), IR trans R, IS trans S (1d) în alcool primar sau de amestec al lui cu hidricarbură haloidă saturată primară şi/sau cu eter alchilic primar, aşa ca eterul de petrol sau hexanul, se adaugă pentru iniţiere cristale şi se efectuează cristalizarea la temperatura de la + 30 până la - 10°C cu separare ulterioară la temperatura indicată a cristalelor perechii enantiomerice, care conţine la şi 1b. Использование: в сельском хозяйстве, так как проявляет инсектицидную активность. Сущность: способ получения новой смеси изомеров синтетических пиретроидов общей формулы X2С=СO-СOOСH(СN)-С6H4OС6H5, где Х - хлор, бром, содержащих по меньшей мере 95 мас % энантиомерных пар IR цис S. IS цис R (a), IR транс S и IS транс R (b) в массовом соотношении от 55:45 до 25:75. Выход 7-80%. Т. пл. продукта °С, при массовом соотношении изомеров 1а:1b - 55:45, 50:50, 40:60, 30:70, 25%75 равна соответственно 61,5-64, 60,5-62, 63,5-65, 65-68, 67-71,5. В расплав или насыщенный раствор смеси энантиомерных пар IR цис S, IS цис R (1a) и IR транс S, IS транс R (1b) и IR цис R, IS цис S (1с), IR транс R, IS- транс S (d) в низшем спирте или его смеси с низшим галоидуглеводороде и/или низшем алкиловом эфире, таком как петролейный эфир или гексан добавляют затравочный кристалл и ведут кристаллизацию при температуре от (+)30 до (-)10°С с последующим отделением при указанной температуре кристаллов энантиомерной пары, содержащей 1а и 1b. 1 з.п.ф-лы, 19 табл.