摘要:
When 1-halogeno-3-alkene-2-ol is reacted with an ortho-carboxylic ester and/or a ketene acetal, a .gamma.-halogeno-.delta.-unsaturated-carboxylic ester is obtained as a main reaction product. When this intermediate is treated with a basic substance, a substituted cyclopropane-carboxylic ester is formed. This ester can be used as an insecticide or an agricultural chemical as it is or after the alcohol residue of the ester has been converted to other alcohol residue.
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:
A non-irritating base component useful for cosmetics and topical preparations consisting of 2,6,10,15,19,23-hexamethyltetracosane having a high stability and being very safe for use on skin are hereby disclosed. Said component is synthesized by (a) preparing diacetylene dialcohol by reacting at least one ketone selected from the group consisting of 6,10-dimethylundecan-2-one, 6,10-dimethylundeca-3,9-dien-2-one, 6,10-dimethylundeca-5,9-dien-2-one, 6,10-dimethylundeca-5,10-dien-2-one and 6,10-dimethylundeca-3,5,9-trien-2-one, with acetylene and then subjecting the reaction product to the oxidation coupling, or by reacting ketone with diacetylene and (b) hydrocracking the diacetylene dialcohol directly or after hydrogenation.
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 2,6,10,15,19,23-hexamethyltetracosane-10,15-diol derivatives. Such derivatives are prepared by hydrogenation of 2,6,10,15,19,23-hexamethyltetracosa-11,13-diyne-10,15-diol derivatives and used as starting materials for preparing squalane.
摘要:
Unsaturated alcohols represented by the general formulas (I) and (II) below ##STR1## wherein R is a substituted or unsubstituted hydrocarbon radical, R.sub.2 and R.sub.3 are hydrogen or lower alkyl groups, and R and R.sub.2 may be linked together are mutually isomerized in the presence of a catalyst comprising a transition metal compound of Groups V, VI and VII of the Mendeleev Periodic Table.
摘要:
A process for producing substituted ketones is disclosed comprising reacting an organic halide with a ketone which has a replaceable hydrogen atom on the carbon atom in the .alpha.-position to the carbonyl group, in the presence of an aqueous alkali metal hydroxide and at least one basic nitrogen catalyst such as certain primary amines, secondary amines, tertiary amines, quaternary ammonium salts or betaine-type quaternary ammonium salts.
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:
An alkyne-10,15-diol is synthesized by coupling a 3-alkynol containing methyl groups by using as a catalyst a complex comprised of a halide of a metal of Group VII of the Periodic Table coordinated with an organic phosphorus compound.The so-obtained diol can be formed into squalane [2,6,10,15,19,23-hexamethyl tetracosane] by hydrogenolysis, a combination of hydrogenation and hydrogenolysis or a combination of hydrogenation, dehydration and hydrogenation.
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.