CAS: 59609-49-3; Ethyl 3-(2,2-Dichlorovinyl)-2,2-Dimethylcyclopropanecarboxylate

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CAS号59897-92-6 3.3-二甲基-4.6,6-三... | CAS号60066-84-4 2,2-Dimethyl-3-... | CAS号61820-12-0 5-(2,2-dichloro... | CAS号61820-11-9 Cyclopropanecar... | CAS号66692-75-9 ethyl 3-formyl-... | CAS号650-51-1 三氯乙酸钠 | CAS号65771-92-8 ethyl 5,5-dichl... | CAS号63435-29-0 ethyl 6,6,6-tri... | CAS号866-23-9 (三氯甲基)膦酸二乙酯 | CAS号52314-67-7 氯氰菊酰氯 | CAS号55701-05-8 二氯菊酸 | CAS号59897-92-6 3.3-二甲基-4.6,6-三... | CAS号63142-59-6 4-(2,2-dichloro...

3.3-二甲基-4.6,6-三氯己烯[5]酸乙酯 以78%的收率获得产物二氯菊酸乙酯
参考文献:Process For Preparation Of Substituted Cyclopropane Carboxylic Acids And
标题:Process For Preparation Of Substituted Cyclopropane Carboxylic Acids And
摘要:当1-卤代-3-烯基-2-醇与邻位羧酸酯和/或酮缩醛反应时,主要反应产物是γ-卤代-δ-不饱和羧酸酯.当这种中间体与碱性物质反应时,形成取代环丙烷羧酸酯.这种酯可以直接用作杀虫剂或农药,也可以在将酯的醇残基转化为其他醇残基后使用.

专利信息

专利号:US-10647655-B2
优先权日:2016-09-02
标题:Method for the synthesis of permethrin
发明人：PULLAGURLA MANIK REDDY; NANDA KUMAR MECHERIL VALSAN; VELIGETLA MADHUSUDHANA RAO; RANGISETTY JAGADEESH BABU
权利人:BIOPHORE INDIA PHARMACEUTICALS PVT LTD
摘要:An improved method for the synthesis of substantially pure Permethrin having purity greater than 99.5% by Gas Chromatography provided. The embodiments also relates to a purification process of Permethrin by recrystallization from methanol-water mixture.

专利号:US-4022672-A
优先权日:1976-04-02
标题:Electrochemical synthesis of insecticide intermediates
发明人：ALVAREZ MANUEL; FISHMAN MORRIS L
权利人:FMC CORP
摘要:1,1,1-Trihalo-4-methylpentenes, carrying 2-substituents selected from those conjugate bases of Bronsted acids which are leaving groups in beta eliminations, are reduced electrochemically to 1,1-dihalo-4-methylpentadienes, intermediates in the synthesis of pyrethroid insecticides.

专利号:US-4190730-A
优先权日:1974-10-03
标题:Preparation of 1,1,1-trihalogeno-4-methyl-3-penten-2-ol
发明人：ITOI KAZUO; MORI FUMIO; NISHIDA TAKASHI; OMURA YOSHIAKI
权利人:KURARAY CO
摘要:A 1,1,1-trihalogeno-4-methyl-3-penten-2-ol is prepared by thermally isomerizing 1,1,1-trihalogeno-4-methyl-4-penten-2-ol. The isomerization reaction may be catalyzed by an acid or a transition metal of Group 6B, 7B or 8 of the Periodic Table of Elements, or a compound thereof. The 1,1,1-trihalogeno-4-methyl-3-penten-2-ol thus prepared is useful as a synergist for herbicides or a physiologically active compound, and, additionally, is useful as a starting material for the synthesis of 2,2-dimethyl-3-(2',2'-dihalogenovinyl)-cyclopropane carboxylic esters which are active ingredients of insecticides.

专利号:US-4117247-A
优先权日:1974-10-03
标 题:Preparation of 1,1,1-trihalogeno-4-methyl-3-penten-2-ol
发明人：MORI FUMIO; OMURA YOSHIAKI; NISHIDA TAKASHI; ITOI KAZUO
权利人:KURARAY CO
摘要:A 1,1,1-trihalogeno-4-methyl-3-penten-2-ol is prepared by thermally isomerizing 1,1,1-trihalogeno-4-methyl-4-penten-2-ol. The isomerization reaction may be catalyzed by an acid or a transition metal of Group 6B, 7B or 8 of the Periodic Table of Elements, or a compound thereof. The 1,1,1-trihalogeno-4-methyl-3-penten-2-ol thus prepared is useful as a synergist for herbicides or a physiologically active compound, and, additionally, is useful as a starting material for the synthesis of 2,2-dimethyl-3-(2',2'-dihalogenovinyl)-cyclopropane carboxylic esters which are active ingredients of insecticides.

专利号:US-T102908-I4
优先权日:1977-05-27
标题 :Catalyzed transesterification synthesis
摘要:Esters of the formula ##STR1## wherein X is chlorine or bromine and B is a benzyl group of the formula ##STR2## where Y and Z may be the same or different and are selected from the group consisting of hydrogen, halogen, lower alkyl, lowr alkoxy, phenyl, phenoxy, lower alkyl phenyl, lower alkyl phenoxy, halophenyl and halophenoxy, are prepared by transesterification between BOH and a compound of the formula ##STR3## wherein L is a lower alkyl radical of between 1 and 4 carbon atoms, using as catalyst an organometallic compound selected from (RO) 4 Ti and R' 2 SnO, where R and R' are alkyl radicals of between 1 and 6 carbon atoms. n Useful organometallic catalysts include tetrabutyl titanate, tetraisopropyl titanate, and dibutyl tin(IV)oxide. About 1% by weight of the total charge of reactants is catalyst. n The process is conducted at 100°-200° C. under vacuum, generally in the absence of solvent, with sustained distillation of the LOH by-product until the theoretical amount of alcohol is collected. The product ester is then distilled under vacuum. n For example, 126 g ethyl 3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate, 100 g m-phenoxybenzyl alcohol, and 2.25 grams of tetraisopropyl titanate reacted at 150° C./200 mm Hg yielded the m-phenoxybenzyl ester; bp 181° C./0.1 mm Hg, 89% yield, 99.5% pure.

专利号:US-4289711-A
优先权日:1975-09-05
标 题 :Ester synthesis
发明人：LEE GRAHAME R
权利人:BURROUGHS WELLCOME CO
摘要:A novel process is described for the preparation of compounds of formula ##STR1## wherein R 2 and R 3 are each chloro or bromo; X is carboxyl, nitrile, optionally substituted carbonamide, carbonyl halide or an ester group. Those compounds wherein X is an appropriate ester group --COOB where B is an aryl group such as m-phenoxybenzyl are known insecticides; compounds where X is other than --COOB may be suitably converted thereto. n The novel process consists of a series of steps from the corresponding acetyl compound of formula ##STR2## which comprises halogenation, reduction, esterification and finally elimination reactions.