Preparation of phenoxy-substituted esters and intermediates therefor
    47.
    发明授权
    Preparation of phenoxy-substituted esters and intermediates therefor 失效
    苯氧基取代酯及其中间体的制备

    公开(公告)号:US5008446A

    公开(公告)日:1991-04-16

    申请号:US365559

    申请日:1989-06-13

    CPC分类号: C07C69/16

    摘要: Compounds of the formula I ##STR1## where R.sup.1 is ##STR2## where A is C.sub.1 -C.sub.4 -alkyl, phenyl or C.sub.7 -C.sub.12 -aralkyl and l is 0 or 1, R.sup.2 is C.sub.1 -C.sub.4 -alkyl, n is 0, 1, 2 or 3, m is 1, 2 or 3 and Y is hydrogen, fluorine, chlorine, bromine, C.sub.1 -C.sub.3 -alkyl, C.sub.1 -C.sub.3 -alkoxy, trifluoromethyl, phenyl or phenoxy, and, when m is greater than 1, the individual atoms or groups Y are identical or different, are prepared by a process in which, in a first stage, a diester of the formula II ##STR3## is hydrolyzed with one equivalent of an aqueous alkali metal hydroxide to give the alcohol of the formula IIIa ##STR4## in a second stage this alcohol is converted with a halogenating agent or a sulfonyl chloride or bromide into a compound of the formula IIIb ##STR5## where X is a nucleophilically displaceable leaving group, such as chlorine, bromine, mesyl or tosyl, and then, in a third stage, the compound IIIb is reacted with a phenolate of the formula IV ##STR6## where y and m have the abovementioned meanings, in the presence of an aprotic solvent to give compound I. Furthermore, diesters of the formula II and a process for their preparation are provided, the said diesters being prepared by reacting a lactone of the formula V ##STR7## with a Grignard compound VIR.sup.1 MgZ VIwhere Z is chlorine or bromine, in a nonpolar organic solvent, from 2 to 3 moles of the Grignard compound being used per mole of lactone, and the reaction mixture then being treated with from 2 to 3 moles of anhydride VII ##STR8## per mole of lactone.

    Agents for reducing transpiration of plants
    50.
    发明授权
    Agents for reducing transpiration of plants 失效
    用于减少植物蒸腾的试剂

    公开(公告)号:US4943315A

    公开(公告)日:1990-07-24

    申请号:US306560

    申请日:1989-02-06

    IPC分类号: A01N3/00 A01N47/30 A01N49/00

    CPC分类号: A01N47/30 A01N3/00 A01N49/00

    摘要: Agents for reducing transpiration in plants and/or avoiding impairment to plants caused by heat and dry stress, comprising a synergistic mixture containing at least one acetylene compound of the formula I ##STR1## where the substituents have the following meanings R.sup.1 CH.sub.2 OH, COOH, CH.sub.2 OR.sup.4, COOR.sup.4 or CHXY,OR.sup.2 andY OR.sup.3 or X and Y together are C.sub.2 -C.sub.5 -alkylenedioxy which is unsubstituted or mono-, di- or trisubstituted by C.sub.1 -C.sub.4 -alkyl, or are a doubly bonded oxygen atom,R.sup.2, R.sup.3 C.sub.1 -C.sub.8 -alkyl andR.sup.4 C.sub.1 -C.sub.8 -alkyl, C.sub.2 -C.sub.8 -alkoxyalkyl, C.sub.2 -C.sub.4 -haloalkyl, phenyl or C.sub.7 -C.sub.16 -phenylalkyl,and at least one phenylbenzylurea of the general formula II ##STR2## where the substituents have the following meanings R.sup.5 hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -haloalkyl, C.sub.1 -C.sub.4 -haloalkoxy, phenyl or C.sub.7 -C.sub.16 -phenylalkyl andR.sup.6 -R.sup.11 hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy halogen, C.sub.1 -C.sub.4 -haloalkyl, C.sub.1 -C.sub.4 -haloalkoxy, phenyl, phenoxy, nitro, cyano, hydroxy, OR.sup.4, CHO or COOR.sup.4.

    摘要翻译: 包含减少植物中蒸腾和/或避免由热和干胁迫引起的对植物的损伤的试剂,其包含至少一种式I的乙炔化合物(I)的协同混合物,其中取代基具有以下含义:R 1 CH 2 OH, COOH,CH 2 OR 4,COOR 4或CHXY,OR 2和Y OR 3或X和Y一起是未被取代或未被C1-C4烷基单取代或二取代或三取代的C2-C5-亚烷基二氧基,或是双键氧原子,R2 ,R 3 C 1 -C 8 - 烷基和R 4 C 1 -C 8 - 烷基,C 2 -C 8 - 烷氧基烷基,C 2 -C 4 - 卤代烷基,苯基或C 7 -C 16 - 苯基烷基,和至少一种通式II的苯基苯基脲 )其中取代基具有以下含义:R 5氢,C 1 -C 4 - 烷基,C 1 -C 4 - 烷氧基,C 1 -C 4 - 卤代烷基,C 1 -C 4 - 卤代烷氧基,苯基或C 7 -C 16 - 苯基烷基和R 6 -R 11氢, C 1 -C 4烷氧基,C 1 -C 4卤代烷基,C 1 -C 4卤代烷氧基,苯基,苯氧基,硝基,氰基,羟基,OR 4,CHO或COOR 4。