Halogenated hydrocarbons and a method for their preparation
    21.
    发明授权
    Halogenated hydrocarbons and a method for their preparation 失效
    卤代烃及其制备方法

    公开(公告)号:US4259263A

    公开(公告)日:1981-03-31

    申请号:US080326

    申请日:1979-10-01

    申请人: John Crosby

    发明人: John Crosby

    CPC分类号: C07C21/18 C07C17/25

    摘要: A halogenated hydrocarbon having the general formula: ##STR1## wherein Y represents fluorine, chlorine, bromine or --(CF.sub.2).sub.m W, R represents hydrogen or lower alkyl, R.sup.1 represents lower alkyl, X represents chlorine, bromine or iodine, W represents hydrogen, fluorine or chlorine and m is 1 or 2, is prepared by heating a compound having the general formula: ##STR2## wherein R, R.sup.1, X, Y, W and m have the meanings given above and Z represents chlorine, bromine or iodine, in a polar aprotic solvent together with an alkanolamine, optionally in the presence of a copper salt.

    摘要翻译: 具有以下通式的卤代烃:其中Y表示氟,氯,溴或 - (CF 2)m W,R表示氢或低级烷基,R 1表示低级烷基,X表示氯,溴或碘,W表示氢, 氟或氯,m为1或2,通过加热具有以下通式的化合物制备:其中R,R 1,X,Y,W和m具有上述含义,Z表示氯,溴或碘, 在极性非质子溶剂中与烷醇胺一起,任选在铜盐存在下进行。

    Process for the preparation of 2-hydroxyalkyl halophenones
    23.
    发明授权
    Process for the preparation of 2-hydroxyalkyl halophenones 失效
    2-羟基烷基二氯苯酚的制备方法

    公开(公告)号:US06300522B1

    公开(公告)日:2001-10-09

    申请号:US09673509

    申请日:2000-11-29

    IPC分类号: C07C4541

    摘要: A process is provided for the preparation of compounds of Formula (1): wherein X1 and X2 are each independently H, Cl or F, provided that at least one of X1 and X2 is Cl or F; one of R1 and R2 is H and the other is OH; and R5 is an unsubstituted alkyl, preferably a C1-6 alkyl, group. The process comprises condensing a 2-chloroalkanoic acid with an optionally substituted benzyl alcohol to form a 2-(optionally substituted benzyloxy) alkanoic acid, converting the condensation product to the corresponding acid chloride and then either reacting the acid chloride with a compound of the Formula (2) in the presence of a source of copper (I) to give a compound of Formula (3) wherein one of R3 and R4 is H and the other is optionally substituted benzyloxy; or reacting the acid chloride with a compound of Formula (4): A—NH—B wherein A and B independently represent substituted alkyl, alkoxy, aryl or oxyaryl groups, or are linked to form a heterocyclic ring to form an amide, and then reacting the amide with a compound of Formula (2) to give a compound of Formula (3). The optionally substituted benzyl group from the compound of Formula (3) can removed by hydrogenation.

    摘要翻译: 提供制备式(1)化合物的方法:其中X 1和X 2各自独立地为H,Cl或F,条件是X 1和X 2中的至少一个为Cl或F; R1和R2之一是H,另一个是OH; 并且R 5是未取代的烷基,优选C 1-6烷基。 该方法包括将2-氯链烷酸与任选取代的苄醇缩合以形成2-(任选取代的苄氧基)链烷酸,将缩合产物转化为相应的酰氯,然后使酰氯与式 (2)在铜源(I)的存在下,得到式(3)的化合物,其中R 3和R 4中的一个为H,另一个为任选取代的苄氧基;或使酰氯与式( 4):其中A和B独立地表示取代的烷基,烷氧基,芳基或氧芳基,或连接形成杂环以形成酰胺,然后使酰胺与式(2)的化合物反应,得到 公式(3)。 可以通过氢化除去式(3)化合物中的任选取代的苄基。

    Pyranones
    25.
    发明授权
    Pyranones 失效
    Py子

    公开(公告)号:US5527916A

    公开(公告)日:1996-06-18

    申请号:US211043

    申请日:1994-08-01

    摘要: A process for the separation of at least one isomer from a mixture of isomers of a tetrahydropyran-2-one, having at least two chiral centers which comprises selective reaction of at least one isomer with a reagent catalyzed by a hydrolase enzyme whereby at least one isomer is preferentially converted into a distinct chemical species from the other isomers so that it is susceptible of separation by an appropriate chemical or physical separation process in which the tetrahydropyran-2-one is of Formula (1): ##STR1## wherein: Z is --H or a protecting group susceptible of reaction with the reagent under the influence of the enzyme; andY is formyl or protected formyl.

    摘要翻译: PCT No.PCT / GB92 / 01666 Sec。 371日期1994年8月1日 102(e)日期1994年8月1日PCT提交1992年9月11日PCT公布。 出版物WO93 / 06236 日期:1993年4月1日。一种从四氢吡喃-2-酮的异构体混合物中分离至少一种异构体的方法,其具有至少两个手性中心,所述手性中心包含至少一种异构体与试剂催化的选择性反应 一种水解酶,其中至少一种异构体优先从其它异构体转化为不同的化学物质,使得其易于通过合适的化学或物理分离方法进行分离,其中四氢吡喃-2-酮为式(1): 式(1)其中:Z为-H或在酶的影响下易于与试剂反应的保护基; Y是甲酰基或受保护的甲酰基。

    Pyranones
    26.
    发明授权
    Pyranones 失效
    Py子

    公开(公告)号:US5443970A

    公开(公告)日:1995-08-22

    申请号:US946193

    申请日:1992-09-17

    摘要: A process for the separation of at least one isomer from a mixture of isomers of a tetrahydropyran-2-one, having at least two chiral centres, which comprises selective reaction of at least one isomer with a reagent catalysed by a hydrolase enzyme whereby at least one isomer is preferentially converted into a distinct chemical species from the other isomers so that it is susceptible of separation by an appropriate chemical or physical separation process in which the tetrahydropyranone is of Formula (1): ##STR1## wherein: Z is --H or a protecting group susceptible of reaction with the reagent under the influence of the enzyme; andY is optionally substituted hydrocarbyl.

    摘要翻译: 一种从具有至少两个手性中心的四氢吡喃-2-酮异构体的混合物中分离出至少一种异构体的方法,该方法包括至少一种异构体与由水解酶催化的试剂的选择性反应, 一种异构体优先从其他异构体转化成不同的化学物质,使得它可以通过合适的化学或物理分离方法进行分离,其中四氢吡喃酮具有式(1):其中:Z 是在酶的影响下易于与试剂反应的-H或保护基; Y是任选取代的烃基。

    Process for the preparation of cyclopropane carboxylic acid esters
    27.
    发明授权
    Process for the preparation of cyclopropane carboxylic acid esters 失效
    制备环丙烷羧酸酯的方法

    公开(公告)号:US4551281A

    公开(公告)日:1985-11-05

    申请号:US644230

    申请日:1984-08-27

    申请人: John Crosby

    发明人: John Crosby

    摘要: 3-(2'-chloro-3',3',3'-trifluoropropenyl)-2,2-dimethylcyclopropane-1-carboxylic acid esters are prepared by dehydrohalogenation of the corresponding 3-(2',2'-dichloro-3',3',3-trifluoropropyl) compounds by reaction with an alkali metal carbonate in a polar aprotic solvent. The products are intermediates in the preparation of pyrethroid insecticides or are themselves insecticides.

    摘要翻译: 3-(2',3'-三氟丙烯基)-2,2-二甲基环丙烷-1-羧酸酯通过相应的3-(2',2'-二氯 - 3',3',3-三氟丙基)化合物与碱金属碳酸盐在极性非质子溶剂中反应。 该产品是制备拟除虫菊酯杀虫剂的中间体,或本身是杀虫剂。

    Insecticidal product
    28.
    发明授权
    Insecticidal product 失效
    杀虫产品

    公开(公告)号:US4510098A

    公开(公告)日:1985-04-09

    申请号:US535624

    申请日:1983-09-26

    申请人: John Crosby

    发明人: John Crosby

    IPC分类号: A01N53/00 C07C121/75

    CPC分类号: A01N53/00

    摘要: A novel crystalline modification of an enantiomeric pair of isomers of the insecticide cyhalothrin having improved handling characteristics.

    摘要翻译: 具有改进的处理特性的杀虫剂氯氟氰菊酯的对映体异构体对的新颖结晶改性。