摘要:
Allenic esters of the formula: ##EQU1## (specific examples of R, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are given) and a process for the preparation thereof which comprises reacting propargyl alcohol derivatives with 2-substituted ortho-acetic acid esters in the presence of an acidic catalyst. These allenic esters are rearranged in the presence of an alkali catalyst to form .alpha., .beta., .gamma., .delta.-unsaturated carboxylic acid esters and are useful as intermediates in the synthesis of various perfumes, medicines, agricultural chemicals and the like.
摘要翻译:式R 2 R 1 R 4的酰亚胺酯R 3 -C = C = C-CH-COOR(R,R 1,R 2,R 3和R 4的具体实例)及其制备方法,其包括使炔丙醇衍生物 与2-取代的原乙酸酯在酸性催化剂存在下反应。 这些烯酸酯在碱催化剂存在下重排,形成α,β,γ,δ-不饱和羧酸酯,可用作合成各种香料,药物,农药等的中间体。
摘要:
Novel pesticidal compositions are comprised of a 2,2-dimethyl-3-(substituted ethyl)cyclopropanecarboxylic acid ester as the active ingredient, said cyclopropanecarboxylate having the structural formula: ##STR1## wherein X, Y and Z are the same or different and at least two of same are chlorine or bromine, with the remaining one being hyrogen, methyl, chlorine or bromine; R is an alcohol residue represented by one of the following structural formulae (II), (III), (IV) and (V): ##STR2## where A represents hydrogen, cyano, ethynyl or thiocarbamoyl; Q is hydrogen, chlorine, bromine, fluorine, methyl or trifluoromethyl; R.sup.1 is propargyl or benzyl; R.sup.2 represents 2-halogeno-3-phenyl-1-propen-1-yl, (dihalogenovinyloxy)phenyl, benzylphenyl, phthalimido, thiophthalimido, di- or tetrahydrophthalimido or dialkylmaleido; R.sup.3 represents allyl, 2,4-pentadienyl, propargyl or benzyl.
摘要翻译:新型杀虫剂组合物由2,2-二甲基-3-(取代的乙基)环丙烷甲酸酯作为活性成分组成,所述环丙烷羧酸酯具有以下结构式:其中X,Y和Z相同或不同, 其中至少两个是氯或溴,剩下的一个是氢,甲基,氯或溴; R是由以下结构式(II),(III),(IV)和(V)之一表示的醇残基:其中A表示氢,氰基,乙炔基或硫代氨基甲酰基; Q是氢,氯,溴,氟,甲基或三氟甲基; R1是炔丙基或苄基; R 2表示2-卤代-3-苯基-1-丙烯-1-基,(二卤代乙烯基氧基)苯基,苄基苯基,邻苯二甲酰亚氨基,硫代邻苯二甲酰亚氨基,二或四氢邻苯二甲酰亚氨基或二烷基马来酰亚胺; R3表示烯丙基,2,4-戊二烯基,炔丙基或苄基。
摘要:
1,1,1-Trihalogeno-4-methyl pentenes and 1,1-dihalogeno-4-methyl-1,3-pentadienes are produced. These compounds are of value as intermediates for the production of pyrethrin analogs which are of use as insecticides or agricultural chemicals.
摘要:
Racemic modifications each consisting of specific isomers of .alpha.-cyano-3-phenoxybenzyl cis- or trans-2,2-dimethyl-3-(2,2,2-trichloroethyl)cyclopropanecarboxylate with the absolute configurations [.alpha.S, 1R] an [.alpha.R, 1S] with respect to the asymmetric carbon atoms in the alcohol and acid moieties, a method of producing the same and pesticidal compositions containing the same as active ingredient are provided. .alpha.-Cyano-3-phenoxybenzyl cis- or trans-2,2-dimethyl-3-(2,2,2-trichloroethyl)cyclopropanecarboxylate has higher pesticidal activities than those pesticides that are in general use and consequently selective production of the above specific racemic modification as defined by the combinations of the absolute configuration with respect to the asymmetric carbon atom at the position in the alcohol moiety and the absolute configuration with respect to the asymmetric carbon atom in the acid moiety provides compounds having still higher pesticidal activities.
摘要:
A process for obtaining a stereospecific nerolidol at the .DELTA..sup.6 -position thereof by rectifying a mixture of .DELTA..sup.6 -cis-nerolidol and .DELTA..sup.6 -trans-nerolidol in rectification column having from 10 to 100 theoretical plates with a reflux ratio of from 2 to 200 at a temperature below 230.degree. C. under reduced pressure to separate each stereospecific nerolidol from said mixture.
摘要:
1,1,1-Trihalogeno-4-methyl pentenes and 1,1-dihalogeno-4-methyl-1,3-pentadienes are produced. These compounds are of value as intermediates for the production of pyrethrin analogs which are of use as insecticides or agricultural chemicals.
摘要:
2,7,10,15,18,23-Hexamethyltetracosane is a novel compound. This compound is prepared [1] by hydrogenating 2,7,10,15,18,23-hexamethyltetracosa-1,6,18,23-tetraene-11,13-diyne-10,15-diol [itself a novel compound] or 2,7,10,15,18,23-hexamethyltetracosa-11,13-diyne-10,15-diol, dehydrating the hydrogenated intermediates, and thence hydrogenating the dehydrated precursors, or [2] by selectively, partially hydrogenating the said 10,15-diol compounds and thence hydrogenolyzing the precursor diols, or [3] by hydrogenolyzing the said 10,15-diol compounds, or [4] by hydrogenolyzing the hydrogenated intermediates of the reaction [1]. The compound, 3,6,11-trimethyl-undeca-6,11-dien-1-yl-3-ol, a starting material intermediate, is also a novel compound.
摘要:
Novel pesticidal compositions are comprised of a 2,2-dimethyl-3-(substituted ethyl)cyclopropanecarboxylic acid ester as the active ingredient, said cyclopropanecarboxylate having the structural formula: ##STR1## wherein X, Y and Z are the same or different and at least two of same are chlorine or bromine, with the remaining one being hydrogen, methyl, chlorine or bromine; R is an alcohol residue represented by one of the following structural formulae (II), (III), (IV) and (V): ##STR2## where A represents hydrogen, cyano, ethynyl or thiocarbamoyl; Q is hydrogen, chlorine, bromine, fluorine, methyl or trifluoromethyl; R.sup.1 is propargyl or benzyl; R.sup.2 represents 2-halogeno-3-phenyl-1-propen-1-yl, (dihalogenovinyloxy)phenyl, benzylphenyl, phthalimido, thiophthalimido, di- or tetrahydrophthalimido or dialkylmaleimido; R.sup.3 represents allyl, 2,4-pentadienyl, propargyl or benzyl.
摘要翻译:新型杀虫剂组合物由2,2-二甲基-3-(取代的乙基)环丙烷甲酸酯作为活性成分组成,所述环丙烷羧酸酯具有以下结构式:其中X,Y和Z相同或不同, 其中至少两个是氯或溴,剩下的一个是氢,甲基,氯或溴; R是由以下结构式(II),(III),(IV)和(V)之一表示的醇残基:其中A表示氢,氰基,乙炔基或硫代氨基甲酰基; Q是氢,氯,溴,氟,甲基或三氟甲基; R1是炔丙基或苄基; R 2表示2-卤代-3-苯基-1-丙烯-1-基,(二卤代乙烯基氧基)苯基,苄基苯基,苯二甲酰亚氨基,硫代邻苯二甲酰亚氨基,二或四氢邻苯二甲酰亚氨基或二烷基马来酰亚胺; R3表示烯丙基,2,4-戊二烯基,炔丙基或苄基。
摘要:
Novel pesticidal compositions are comprised of a 2,2-dimethyl-3-(substituted ethyl)cyclopropanecarboxylic acid ester as the active ingredient, said cyclopropanecarboxylate having the structural formula: ##STR1## wherein X, Y and Z are the same or different and at least two of same are chlorine or bromine, with the remaining one being hydrogen, methyl, chlorine or bromine; R is an alcohol residue represented by one of the following structural formulae (II), (III), (IV) and (V): ##STR2## where A represents hydrogen, cyano, ethynyl or thiocarbamoyl; Q is hydrogen, chlorine, bromine, fluorine, methyl or trifluoromethyl; R.sup.1 is propargyl or benzyl; R.sup.2 represents 2-halogeno-3-phenyl-1-propen-1-yl, (dihalogenovinyloxy)phenyl, benzylphenyl, phthalimido, thiophthalimido, di- or tetrahydrophthalimido or dialkylmaleimido; R.sup.3 represents allyl, 2,4-pentadienyl, propargyl or benzyl.
摘要翻译:新型杀虫剂组合物由2,2-二甲基-3-(取代的乙基)环丙烷甲酸酯作为活性成分组成,所述环丙烷羧酸酯具有以下结构式:其中X,Y和Z相同或不同, 其中至少两个是氯或溴,剩下的一个是氢,甲基,氯或溴; (II),(IV)和(V)表示的醇残基:R是由下列结构式(II),(III),(IV)和(V)之一表示的醇残基: (Ⅴ)其中A代表氢,氰基,乙炔基或硫代氨基甲酰基; Q是氢,氯,溴,氟,甲基或三氟甲基; R1是炔丙基或苄基; R 2表示2-卤代-3-苯基-1-丙烯-1-基,(二卤代乙烯基氧基)苯基,苄基苯基,苯二甲酰亚氨基,硫代邻苯二甲酰亚氨基,二或四氢邻苯二甲酰亚氨基或二烷基马来酰亚胺; R3表示烯丙基,2,4-戊二烯基,炔丙基或苄基。
摘要:
A process for preparing stereospecific farnesylacetic acid and ester thereof by rectifying a mixture of .DELTA..sup.4,8 -trans- and .DELTA..sup.4 -cis-.DELTA..sup.8 -trans-farnesylacetic acids or esters thereof or .DELTA..sup.4,8 -trans- and .DELTA..sup.4 -cis-.DELTA..sup.8 -trans-farnesylacetic acid or esters thereof or a mixture of four isomers of the said farnesylacetic acids or esters thereof.