Preparation of 4-dialkoxymethylpyrazoles
    1.
    发明授权
    Preparation of 4-dialkoxymethylpyrazoles 失效
    4-二烷氧基甲基吡唑的制备

    公开(公告)号:US5464508A

    公开(公告)日:1995-11-07

    申请号:US97116

    申请日:1993-07-27

    CPC分类号: C07D231/12 C25B3/02

    摘要: A process for preparing 4-dialkoxymethylpyrazoles of the formula I ##STR1## where R.sup.1 is n-alkyl,R.sup.2 is a hydrocarbon radical,R.sup.3 and R.sup.4 are each hydrogen, a hydrocarbon radical, cyano, halogen or alkoxycarbonyl,entails electrochemical oxidation of a 4-methylpyrazole of the formula II ##STR2## in the presence of an alkanol R.sup.1 --OH.

    摘要翻译: 制备式I的4-二烷氧基甲基吡唑的方法,其中R 1是正烷基,R 2是烃基,R 3和R 4各自是氢,烃基,氰基,卤素或烷氧基羰基,需要电化学氧化 在链烷醇R1-OH的存在下,式II的4-甲基吡唑。

    Preparation of benzaldehyde dialkyl acetals and novel benzaldehyde
dialkyl acetals and benzyl esters
    3.
    发明授权
    Preparation of benzaldehyde dialkyl acetals and novel benzaldehyde dialkyl acetals and benzyl esters 失效
    苄基二乙醇和新戊二醛二乙酸乙酯和苯甲酸酯的制备

    公开(公告)号:US5078838A

    公开(公告)日:1992-01-07

    申请号:US499063

    申请日:1990-03-26

    摘要: A process for the preparation of benzaldehyde dialkyl acetals of the general formula ##STR1## where R.sup.1 is alkyl of 1 to 6 carbon atoms, R.sup.2, R.sup.3 and R.sup.4 are hydrogen or halogen, straight-chain, branched or cyclic hydrocarbon radicals or alkoxy, acyloxy, aryloxy or aralkoxy, and n is 1 or 2, in which benzyl derivatives of the general formula ##STR2## where R.sup.2, R.sup.3, R.sup.4 and n have the abovementioned meanings, R.sup.5 is hydrogen or R.sup.6 --CO--, and R.sup.6 is hydrogen or alkyl of 1 to 6 carbon atoms, are anodically oxidized in the presence of an alcohol of the formula R.sup.1 --OH where R.sup.1 has the abovementioned meaning.

    摘要翻译: 制备通式为其中R 1为1至6个碳原子的烷基,R 2,R 3和R 4的苯甲醛二烷基缩醛的方法是氢或卤素,直链,支链或环状烃基或烷氧基, 酰氧基,芳氧基或芳烷氧基,n为1或2,其中通式为“IMAGE”II的苄基衍生物,其中R2,R3,R4和n具有上述含义,R5为氢或R6-CO-,R6为 氢或1至6个碳原子的烷基在式R1-OH的醇的存在下阳离子氧化,其中R 1具有上述含义。

    Preparation of 3-(2-acyloxyethyl)-dihydro-2(3H)furanones
    4.
    发明授权
    Preparation of 3-(2-acyloxyethyl)-dihydro-2(3H)furanones 失效
    3-(2-酰氧基乙基) - 二氢-2(3H)呋喃酮的制备

    公开(公告)号:US5466831A

    公开(公告)日:1995-11-14

    申请号:US99232

    申请日:1993-07-29

    IPC分类号: C07D307/33 C07D307/12

    CPC分类号: C07D307/33

    摘要: A process for the preparation of 3-(2'-acyloxyethyl)-dihydro-2(3H)furanones of the general formula I ##STR1## in which R.sup.1 denotes C.sub.1 -C.sub.12 alkyl, C.sub.5 -C.sub.8 cycloalkyl, aryl, C.sub.7 -C.sub.12 aralkyl, or C.sub.7 -C.sub.12 alkylaryl, in which a 3-(2'-oxyethyl)-dihydro-2(3H)furanone of the general formula II ##STR2## in which R.sup.2 denotes C.sub.1 -C.sub.12 alkyl, C.sub.5 -C.sub.8 cycloalkyl, aryl, C.sub.7 -C.sub.12 aralkyl, or C.sub.7 -C.sub.12 alkylaryl is caused to react with a carboxylic acid, a carboxylic anhydride, and/or an acyl halide in the presence of an acid catalyst at temperatures of from 50.degree. to 250.degree. C. and pressures of from 0.1 to 100 bar.

    摘要翻译: 制备通式I,C5-C8环烷基,芳基,C7-C12芳烷基或C7-C12烷基芳基的3-(2'-酰氧基乙基) - 二氢-2(3H)呋喃酮的方法,其中3 - (2'-氧乙基) - 二氢-2(3H)呋喃酮,其中R 2表示C 1 -C 12烷基,C 5 -C 8环烷基,芳基,C 7 -C 12芳烷基或C 7 -C 12芳烷基, C12烷基芳基在酸催化剂存在下,在50-250℃,压力为0.1-100巴的条件下,与羧酸,羧酸酐和/或酰卤反应。

    Preparation of tetrahydropyran-4-carboxylic acid and esters thereof
    6.
    发明授权
    Preparation of tetrahydropyran-4-carboxylic acid and esters thereof 失效
    四氢吡喃-4-羧酸及其酯的制备

    公开(公告)号:US5371246A

    公开(公告)日:1994-12-06

    申请号:US110219

    申请日:1993-08-23

    CPC分类号: C07D309/08

    摘要: A process for the preparation of tetrahydropyran-4-carboxylic acid and esters thereof of the general formula I ##STR1## in which R.sup.1 denotes hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.5 -C.sub.8 cycloalkyl, or aryl by the reaction of a dihydro-2(3H)furanone of the general formula II ##STR2## in which R.sup.2 denotes hydrogen, C.sub.1 -C.sub.6 alkyl, or --CO--R.sup.3 andR.sup.3 denotes hydrogen or C.sub.1 -C.sub.6 alkyl, with water or an alcohol of the general formula IIIR.sup.1 --OH (III),in whichR.sup.1 has the aforementioned meaning,at temperatures ranging from 200.degree. to 350.degree. C. in the presence of a heterogenous acid catalyst, in which use is made of a fixed heterogenous acid catalyst.

    摘要翻译: 制备通式I的四氢吡喃-4-羧酸及其酯的方法,其中R 1表示氢,C 1 -C 6烷基,C 5 -C 8环烷基或芳基,其中二氢 -2(3H)呋喃酮,其中R 2表示氢,C 1 -C 6烷基或-CO-R 3,R 3表示氢或C 1 -C 6烷基,其中R 2表示氢或C 1 -C 6烷基, 在异种酸催化剂的存在下,在200〜350℃的温度范围内,通式III的R1-OH(Ⅲ),其中R 1具有上述含义,其中使用固定的异种酸催化剂。

    Pyridine derivatives and their use for controlling undesirable plant
growth
    7.
    发明授权
    Pyridine derivatives and their use for controlling undesirable plant growth 失效
    吡啶衍生物及其用于控制​​不希望的植物生长的用途

    公开(公告)号:US5262387A

    公开(公告)日:1993-11-16

    申请号:US783310

    申请日:1991-11-20

    摘要: Pyridine derivatives of the formulae ##STR1## wherein W, X, Y and Z are each C--R.sup.4, N or N.fwdarw.O, with the proviso that the ring contains only one heteroatom, and the substituents R.sup.1, R.sup.2 and R.sup.3 have the following meanings:R.sup.1 is alkoxy, substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted alkenyl, or substituted or unsubstituted alkynyl,R.sup.2 is hydrogen,R.sup.3 is formyl, 4,5-dihydrooxazol-2-yl or --CO--A--R.sup.5 or --CO--NR.sup.6.sup.R.sup.7, whereR.sup.4 is halogen, nitro, cyano, substituted or unsubstituted alkyl, substituted or unsubstituted benzyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, alkoxy, alkylthio, haloalkoxy, haloalkylthio, alkenyloxy, alkynyloxy, alkylsulfinyl, alkylsulfonyl, haloalkylsulfonyl, substituted or unsubstituted phenoxy or phenylthio, a substituted or unsubstituted 5- or 6-membered heterocyclic radical having one or two heteroatoms selected from the group consisting of oxygen, sulfur and nitrogen, or is substituted or unsubstituted phenyl,A is oxygen or sulfur,R.sup.5 is hydrogen, substituted or unsubstituted alkyl, substituted or unsubstituted benzyl, cycloalkyl, substituted or unsubstituted phenyl,one equivalent of a cation or the radical --N.dbd.CR.sup.8 R.sup.9 andR.sup.6 and R.sup.7 are hydrogen or alkyl or together denote a methylene chain having 4 or 5 members,their agriculturally utilizable salts, and their use for controlling unwanted plant growth.

    摘要翻译: 其中W,X,Y和Z各自为C-R 4,N或N-> O的吡啶衍生物,条件是环仅含有一个杂原子,并且取代基R 1,R 2和 R3具有以下含义:R 1是烷氧基,取代或未取代的烷基,取代或未取代的环烷基,取代或未取代的烯基,或取代或未取代的炔基,R 2是氢,R 3是甲酰基,4,5-二氢恶唑-2-基或 - CO-A-R5或-CO-NR6R7,其中R4是卤素,硝基,氰基,取代或未取代的烷基,取代或未取代的苄基,取代或未取代的环烷基,取代或未取代的烯基,取代或未取代的炔基,烷氧基,烷硫基,卤代烷氧基 卤代烷硫基,烯氧基,炔氧基,烷基亚磺酰基,烷基磺酰基,卤代烷基磺酰基,取代或未取代的苯氧基或苯硫基,取代或未取代的具有一个或两个选自基团的杂原子的5-或6-元杂环基 氧,硫和氮的取代基,或者是取代或未取代的苯基,A是氧或硫,R5是氢,取代或未取代的烷基,取代或未取代的苄基,环烷基,取代或未取代的苯基,1当量的阳离子或基团 -N = CR8R9,R6和R7是氢或烷基或一起表示具有4或5个成员的亚甲基链,它们的农业上可利用的盐,以及它们用于控制不想要的植物生长的用途。

    Preparation of .alpha.,.beta.-unsaturated carbonyl compounds
    10.
    发明授权
    Preparation of .alpha.,.beta.-unsaturated carbonyl compounds 失效
    (ALPHA),(BETA) - 饱和碳化合物的制备

    公开(公告)号:US5169958A

    公开(公告)日:1992-12-08

    申请号:US769022

    申请日:1991-10-01

    摘要: A process for the preparation of .alpha.,.beta.-unsaturated carbonyl compounds of the formula I ##STR1## where R.sup.1 is hydrogen, C.sub.1 -C.sub.10 -alkyl, C.sub.1 -C.sub.10 -alkoxy or aryloxy,R.sup.2 is aryl which is unsubstituted or substituted by C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, trifluoromethyl and/or halogen andR.sup.3 is tetrahydrofuranyl or aryl which is substituted by C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, trifluoromethyl and/or halogen, which comprises reacting 3-amino-2-propen-1-ones of the formula II ##STR2## where R.sup.1 and R.sup.2 have the abovementioned meanings, and R.sup.4 and R.sup.5 are, independently of one another, hydrogen, C.sub.1 -C.sub.10 -alkyl or aryl, with a magnesium halide of the formula IIIR.sup.3 --Mg--Y (III) where Y is halogen, at from -20.degree. to 100.degree. C., and novel .alpha.,.beta.-unsaturated carbonyl compounds and novel 3-amino-2-propen-1-ones are described.

    摘要翻译: 制备式I的α,β-不饱和羰基化合物的方法,其中R1是氢,C1-C10-烷基,C1-C10-烷氧基或芳氧基,R2是未取代或取代的芳基 C1-C4-烷基,C1-C4-烷氧基,三氟甲基和/或卤素,R3是被C1-C4-烷基,C1-C4-烷氧基,三氟甲基和/或卤素取代的四氢呋喃基或芳基,其包括使3 - 氨基-2-丙烯-1-酮,其中R 1和R 2具有上述含义,并且R 4和R 5彼此独立地为氢,C 1 -C 10 - 烷基或芳基, 与式III的卤化镁R3-Mg-Y(III)其中Y是卤素,在-20℃至100℃,和新的α,β-不饱和羰基化合物和新的3-氨基-2-丙烯 描述-1。