Process for the preparation of vinylcyclopropanecarboxylic acid
derivatives
    1.
    发明授权
    Process for the preparation of vinylcyclopropanecarboxylic acid derivatives 失效
    乙烯基环丙烷羧酸衍生物的制备方法

    公开(公告)号:US4673760A

    公开(公告)日:1987-06-16

    申请号:US778458

    申请日:1985-09-20

    CPC classification number: C07D309/30

    Abstract: Disclosed is a process for preparing cis-trans isomer mixtures of 2,2-dimethyl-3(.beta.,.beta.-dichlorovinyl)-cyclopropane-1-carboxylic acid esters, having a high cis/trans isomer ratio, wherein a 4,4-dimethyl-5-halogen-6-alkoxytetrahydro-pyrone or a 3,3-dimethyl-4-halogen-5-oxo-pentanic acid ester is reacted with dichlorophosphonic acid esters in the presence of alkali alcoholates or alkali hydrides or lithium alkyls.Also disclosed are novel starting tetrahydropyrone compounds usable in the above process, and a process for preparation of the novel compounds which includes reacting .beta.,.beta.-dimethyl-.gamma.,.delta.-dihalogen-.delta.-valerolactones with alkali alcoholates at reaction temperatures between -10.degree. and +50.degree. C.

    Abstract translation: 公开了一种具有高顺/反异构体比的2,2-二甲基-3(β,β-二氯乙烯基) - 环丙烷-1-羧酸酯的顺反异构体混合物的方法, 二甲基-5-卤素-6-烷氧基四氢吡喃酮或3,3-二甲基-4-卤代-5-氧代 - 戊酸酯与碱金属醇盐或碱金属氢化物或烷基锂反应,与二氯膦酸酯反应。 还公开了可用于上述方法的新型起始四氢吡喃酮化合物,以及制备新化合物的方法,该方法包括使反应温度在-10℃之间的β,β-二甲基-γ,δ-二卤代-Δ-戊内酯与碱性醇化物反应 和+ 50℃

    Method of preparing dihalogen vinyl cyclopropanecarboxylic acid esters
    2.
    发明授权
    Method of preparing dihalogen vinyl cyclopropanecarboxylic acid esters 失效
    制备二卤代乙烯基环丙烷羧酸酯的方法

    公开(公告)号:US4198343A

    公开(公告)日:1980-04-15

    申请号:US11029

    申请日:1979-02-09

    CPC classification number: C07D307/30

    Abstract: A method of preparing certain dihalogen vinyl cyclopropane carboxylic acid esters of the formula ##STR1## wherein R is an alkyl moiety and X is chlorine or bromine by exposing a dihalogen vinyl dihydrofuran of the formula ##STR2## to light, e.g., ultraviolet light. Also disclosed is a method for preparing such 2,4,4-trimethyl-3-carbalkoxy-5-(.beta.,.beta.-dihalogenvinyl)-4,5-dihydrofurans by reaction of a .beta.-alkoxycrotonic acid ester or 3,3-bisalkoxybutyric acid ester with a 1,1,1-trihalogen-4-methyl-3- or -4-pentene-2-ol in the presence of an acid catalyst. Also disclosed is a method of converting such 2,4,4-trimethyl-3-carbalkoxy-5-(.beta., .beta.-dihalogenvinyl)-4,5-dihydrofuran by thermal rearrangement into 2,5,5-trimethyl-3-carbalkoxy-4-(.beta.,.beta.-dihalogenvinyl)-4,5-dihydrofurans. Such 2,4,4- and 2,5,5-trimethyl-3-carbalkoxy-5-(.beta.,.beta.-dihalogenvinyl)-4,5-dihydrofurans are new.

    Abstract translation: 一种制备式(Ⅰ)的某些二卤代乙烯基环丙烷羧酸酯的方法,其中R是烷基部分,X是氯或溴,通过将式II的二卤代乙烯基二氢呋喃暴露于例如紫外光 。 还公开了通过β-烷氧基链烯酸酯或3,3-双烷氧基丁酸酯的反应来制备这种2,4,4-三甲基-3-烷氧基-5-(β,β-二卤代乙烯基)-4,5-二氢呋喃的方法 酸酯与1,1,1-三卤代-4-甲基-3-或-4-戊烯-2-醇在酸催化剂存在下反应。 还公开了通过热重排将这种2,4,4-三甲基-3-烷氧基-5-(+ 62,β-二卤代乙烯基)-4,5-二氢呋喃转化成2,5,5-三甲基-3- 烷基氧基-4-(β,β-二卤代乙烯基)-4,5-二氢呋喃。 这种2,4,4-和2,5,5-三甲基-3-烷氧基-5-(β,β-二卤代乙烯基)-4,5-二氢呋喃是新的。

    Method of preparing dihalogen vinyl cyclopropanecarboxylic acid esters
    3.
    发明授权
    Method of preparing dihalogen vinyl cyclopropanecarboxylic acid esters 失效
    制备二卤代乙烯基环丙烷羧酸酯的方法

    公开(公告)号:US4198342A

    公开(公告)日:1980-04-15

    申请号:US11028

    申请日:1979-02-09

    CPC classification number: C07D307/30

    Abstract: A method of preparing certain dihalogen vinyl cyclopropane carboxylic acid esters of the formula ##STR1## wherein R is an alkyl moiety and X is chlorine or bromine by exposing a dihalogen vinyl dihydrofuran of the formula ##STR2## to light, e.g., ultraviolet light. Also disclosed is a method for preparing such 2,4,4-trimethyl-3-carbalkoxy-5-(.beta..beta.-dihalogenvinyl)-4,5-dihydrofurans by reaction of a .beta.-alkoxycrotonic acid ester or 3,3-bisalkoxybutyric acid ester with a 1,1,1-trihalogen-4-methyl-3-or -4-pentene-2-ol in the presence of an acid catalyst. Also disclosed is a method of converting such 2,4,4-trimethyl-3-carbalkoxy-5-(.beta.,.beta.-dihalogenvinyl)-4,5-dihydrofuran by thermal rearrangement into 2,5,5-trimethyl-3-carbalkoxy-4-(.beta.,.beta.-dihalogenvinyl)-4,5-dihydrofurans. Such 2,4,4- and 2,5,5-trimethyl-3-carbalkoxy-5-(.beta.,.beta.-dihalogenvinyl)-4,5-dihydrofurans are new.

    Abstract translation: 一种制备式(Ⅰ)的某些二卤代乙烯基环丙烷羧酸酯的方法,其中R是烷基部分,X是氯或溴,通过将式II的二卤代乙烯基二氢呋喃暴露于例如紫外光 。 还公开了通过β-烷氧基巴豆酸酯或3,3-双烷氧基丁酸的反应来制备这种2,4,4-三甲基-3-烷氧基-5-(β-β-卤代乙烯基)-4,5-二氢呋喃的方法 酯与1,1,1-三卤代-4-甲基-3-或-4-戊烯-2-醇在酸催化剂存在下反应。 还公开了通过热重排将这种2,4,4-三甲基-3-烷氧基-5-(β,β-二卤代乙烯基)-4,5-二氢呋喃转化成2,5,5-三甲基-3-碳烷氧基 -4-(β,β-二卤代乙烯基)-4,5-二氢呋喃。 这种2,4,4-和2,5,5-三甲基-3-烷氧基-5-(β,β-二卤代乙烯基)-4,5-二氢呋喃是新的。

    Method of preparing dihalogen vinyl cyclopropanecarboxylic acid esters
    4.
    发明授权
    Method of preparing dihalogen vinyl cyclopropanecarboxylic acid esters 失效
    制备二卤代乙烯基环丙烷羧酸酯的方法

    公开(公告)号:US4180446A

    公开(公告)日:1979-12-25

    申请号:US937622

    申请日:1978-08-28

    CPC classification number: C07D307/30 Y10S204/90

    Abstract: A method of preparing certain dihalogen vinyl cyclopropane carboxylic acid esters of the formula ##STR1## wherein R is an alkyl moiety and X is chlorine or bromine by exposing a dihalogen vinyl dihydrofuran of the formula to light, e.g., ultraviolet light. Also disclosed is a method for preparing such 2,4,4-trimethyl-3-carbalkoxy-5-(.beta.,.beta.-dihalogen-vinyl)-4,5-dihydrofurans by reaction of a .beta.-alkoxycrotonic acid ester or 3,3-bisalkoxybutyric acid ester with a 1,1,1-trihalogen-4-methyl-3- or -4-pentene-2-ol in the presence of an acid catalyst. Also disclosed is a method of converting such 2,4,4-trimethyl-3-carbalkoxy-5-(.beta.,.beta.-dihalogenvinyl)-4,5-dihydrofuran by thermal rearrangement into 2,5,5-trimethyl-3-carbalkoxy-4-(.beta.,.beta.-dihalogen-vinyl)-4,5-dihydrofurans. Such 2,4,4- and 2,5,5-trimethyl-3-carbalkoxy-5-(.beta.,.beta.-dihalogenvinyl)-4,5-dihydrofurans are new.

    Abstract translation: 一种制备式(Ⅰ)的某些二卤代乙烯基环丙烷羧酸酯的方法,其中R是烷基部分,X是氯或溴,通过将式II的二卤代乙烯基二氢呋喃暴露于例如紫外光 。 还公开了通过β-烷氧基链烷酸酯或3,3'-二氧代环己烷二羧酸的反应制备这种2,4,4-三甲基-3-烷氧基-5-(β,β-二卤代 - 乙烯基)-4,5-二氢呋喃的方法 - 双烷氧基丁酸酯与1,1,1-三卤代-4-甲基-3-或-4-戊烯-2-醇在酸催化剂存在下反应。 还公开了通过热重排将这种2,4,4-三甲基-3-烷氧基-5-(β,β-二卤代乙烯基)-4,5-二氢呋喃转化成2,5,5-三甲基-3-碳烷氧基 -4-(β,β-二卤代 - 乙烯基)-4,5-二氢呋喃。 这种2,4,4-和2,5,5-三甲基-3-烷氧基-5-(β,β-二卤代乙烯基)-4,5-二氢呋喃是新的。

    Process for preparing unsaturated six-membered lactones
    7.
    发明授权
    Process for preparing unsaturated six-membered lactones 失效
    制备不饱和六元内酯的方法

    公开(公告)号:US4562270A

    公开(公告)日:1985-12-31

    申请号:US540731

    申请日:1983-10-11

    Abstract: There are disclosed and claimed substituted cyclic lactones and process for preparation thereof. In particular, there are disclosed substituted cyclic lactones having alkyl substituents on the ring, especially such lactones having substituents on the ring of which two on the same carbon atom.Additionally, the invention herein disclosed and claimed relates to a process for the preparation of lactones by heating a six-membered hydroxy substituted lactone in the presence of a catalyst.

    Abstract translation: 公开并要求取代的环状内酯及其制备方法。 特别地,公开了在环上具有烷基取代基的取代的环状内酯,特别是这种在环上具有取代基的内酯,其中两个在相同的碳原子上。 此外,本文公开和要求的本发明涉及通过在催化剂存在下加热六元羟基取代的内酯来制备内酯的方法。

    3H-Furanones
    9.
    发明授权
    3H-Furanones 失效
    3H-呋喃酮

    公开(公告)号:US4508914A

    公开(公告)日:1985-04-02

    申请号:US375060

    申请日:1982-05-05

    Abstract: There are disclosed substituted lactones of the formula ##STR1## wherein A stands for --CH--CH.sub.2 X (X being Cl, Br or OH), --CHY--CHY-- (Y being Cl or Br), or ##STR2## and R.sup.1, R.sup.2 and R.sup.3 are the same or different radicals from the group of hydrogen and C.sub.1 to C.sub.10 alkyls, at least one of the radicals R.sup.2, R.sup.2 and R.sup.3 being such an alkyl radical, and process for making the same.

    Abstract translation: 公开了式IMA的取代内酯,其中A代表-CH-CH 2 X(X是Cl,Br或OH),-CHY-CHY-(Y是Cl或Br)或者R 1,R 2 和R 3是与氢和C 1至C 10烷基的基团相同或不同的基团,基团R 2,R 2和R 3中的至少一个是这样的烷基,及其制备方法。

    Method of preparing 3-alkyl-6-methyl-.beta.-resorcylic acid esters
    10.
    发明授权
    Method of preparing 3-alkyl-6-methyl-.beta.-resorcylic acid esters 失效
    3-烷基-6-甲基-β-间苯二酸酯的制备方法

    公开(公告)号:US4420629A

    公开(公告)日:1983-12-13

    申请号:US416733

    申请日:1982-09-10

    CPC classification number: C07C67/333

    Abstract: 3-alkyl-6-methyl-.beta.-resorcylic acid esters of the Formula ##STR1## wherein R.sup.1 and R.sup.2 represent identical or different alkyl groups of 1 to 10 carbon atoms, are prepared by the reaction of .alpha.-pyrones of the formula ##STR2## wherein R.sup.1 and R.sup.2 have the above meaning, with a base.

    Abstract translation: 其中R 1和R 2表示相同或不同的具有1-10个碳原子的烷基的式Ⅰ'的3-烷基-6-甲基-β-间苯二甲酸酯通过式 图像II其中R1和R2具有上述含义,与碱。

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