Process for the preparation of trichloromethyl carbinols
    1.
    发明授权
    Process for the preparation of trichloromethyl carbinols 失效
    制备三氯甲基甲醇的方法

    公开(公告)号:US4999454A

    公开(公告)日:1991-03-12

    申请号:US784692

    申请日:1985-10-03

    摘要: The invention is directed to a new process for the preparation of carbinols of the general formula I ##STR1## by reaction chloral and olefins of the general formula ##STR2## and by optional acylation of the product comprising dissolving a catalyst of the general formula IIIFe.sub.n (NH.sub.4).sub.x Y.sub.m .multidot.A.sub.p IIIin chloral, then adding the olefin of the general formula II in order to produce a complex of the general formula IV ##STR3## from which a complex of the general formula V ##STR4## is formed, and from the reaction mixture a compound of the general formula I is obtained whereafter(a) the residual complex of the general formula V dissolved in the product is decomposed with an acidic solution and if desired the obtained product is distilled or(b) the product in the reaction mixture is acylated.The compounds prepared according to the invention can be utilized as intermediates when preparing e.g., permethrin and other pyrethroid insecticides.

    摘要翻译: 本发明涉及一种通过反应式I和通式II的烯烃制备通式I的甲醇的新方法,并通过产物的任意酰化,包括将通式 III Fen(NH4)xYmxAp III,然后加入通式II的烯烃以产生通式IV的复合物IV,其中形成通式V的复合物V, 并且从反应混合物中获得通式I的化合物,之后(a)溶解在产物中的通式V的残余络合物用酸性溶液分解,如果需要,所得产物被蒸馏,或(b)产物 在反应混合物中进行酰化。 当制备例如氯菊酯和其他拟除虫菊酯杀虫剂时,根据本发明制备的化合物可以用作中间体。

    Process for the preparation of optically active cyclopropane carboxylic
acids
    3.
    发明授权
    Process for the preparation of optically active cyclopropane carboxylic acids 失效
    光学活性环丙烷羧酸的制备方法

    公开(公告)号:US4508919A

    公开(公告)日:1985-04-02

    申请号:US555187

    申请日:1983-11-25

    CPC分类号: C07C51/487

    摘要: The invention relates to a process for the preparation of enantiomers of trans vinyl-cyclopropane carboxylic acids of the formula I, ##STR1## wherein R is a methyl group or chlorine atom, by resolution of racemic trans compound or mixture of racemic cis and trans compounds by using (+)- or (-)-N-(1-formamido-2,2,2-trichloroethyl)-piperazine as a resolving agent in a polar solvent then separating the crystallizing salt of (+)-trans carboxylic acid and (-)-resolving agent or (-)-trans carboxylic acid and (+)-resolving agent from the mother liquor by filtration and obtaining the enantiomers by acidifying the mother liquor or the salts suspended in water followed by extraction with a solvent and evaporation.The products so obtained may be used as starting materials for the preparation of insecticides.

    摘要翻译: 本发明涉及通过拆分外消旋反式化合物或外消旋的顺式和反式化合物的混合物制备式I的反式乙烯基 - 环丙烷羧酸的对映异构体的方法,其中R是甲基或氯原子 通过在极性溶剂中使用(+) - 或( - ) - N-(1-甲酰胺基-2,2,2-三氯乙基) - 哌嗪作为拆分剂,然后将(+) - 反式羧酸的结晶盐和 ( - ) - 拆分剂或( - ) - 反式羧酸和(+) - 拆分剂通过过滤从母液中获得对映异构体,通过酸化母液或悬浮在水中的盐,然后用溶剂萃取并蒸发 。 所得产物可用作制备杀虫剂的起始原料。

    Preparation of cyclopropanecarboxylic acid esters
    10.
    发明授权
    Preparation of cyclopropanecarboxylic acid esters 失效
    制备环丙烷羧酸酯

    公开(公告)号:US4299972A

    公开(公告)日:1981-11-10

    申请号:US164902

    申请日:1980-07-01

    CPC分类号: C07C69/743

    摘要: A process is disclosed for the preparation of an optically active or racemic cyclopropanecarboxylic acid of the formula (I) ##STR1## wherein R.sup.1 and R.sup.2 are the same or different and each is lower alkyl or halogen;R is a member of a group which contains various cyclic structures as set forth in the specification,the .about. valency bond represents .alpha.- and/or .beta.-configuration;the -- valency bond represents .beta.-configuration,which comprises reacting an optically active or racemic cyclopropanecarboxylic acid of the formula (VII) ##STR2## with a dimethyl-methylidene-ammonium salt of the formula (VIII) ##STR3## wherein X is halogen or lower alkoxy andY.sup.- is a halide or lower alkylsulfate ion in an anhydrous, inert organic solvent, and sebsequently reacting a dimethyl-acloxy-methylidene-ammonium salt thus obtained with an optically active, inactive or racemic alcohol of the formulaR--OHwithout isolation, in the presence of an organic base.

    摘要翻译: 公开了制备式(I)的光学活性或外消旋环丙烷羧酸的方法,其中R 1和R 2相同或不同,各自为低级烷基或卤素; R是包含说明书中所列的各种环状结构的基团的成员,差异化合价键代表α-和/或β-构型; 价键表示β构型,其包括使式(VII)的光学活性或外消旋环丙烷羧酸与式(VIII)的二甲基亚甲基铵盐反应(VIII) )其中X是卤素或低级烷氧基,Y-是在无水惰性有机溶剂中的卤化物或低级烷基硫酸根离子,然后使由此得到的二甲基 - 酰氧基 - 亚甲基 - 铵盐与光学活性的无活性或外消旋醇反应 式R-OH不分离,在有机碱的存在下。