Preparation of 1,1,1-trihalogeno-4-methyl-3-penten-2-ol
    15.
    发明授权
    Preparation of 1,1,1-trihalogeno-4-methyl-3-penten-2-ol 失效
    制备1,1,1-三卤代-4-甲基-3-戊烯-2-醇

    公开(公告)号:US4190730A

    公开(公告)日:1980-02-26

    申请号:US891049

    申请日:1978-03-28

    摘要: A 1,1,1-trihalogeno-4-methyl-3-penten-2-ol is prepared by thermally isomerizing 1,1,1-trihalogeno-4-methyl-4-penten-2-ol. The isomerization reaction may be catalyzed by an acid or a transition metal of Group 6B, 7B or 8 of the Periodic Table of Elements, or a compound thereof. The 1,1,1-trihalogeno-4-methyl-3-penten-2-ol thus prepared is useful as a synergist for herbicides or a physiologically active compound, and, additionally, is useful as a starting material for the synthesis of 2,2-dimethyl-3-(2',2'-dihalogenovinyl)-cyclopropane carboxylic esters which are active ingredients of insecticides.

    摘要翻译: 通过1,1,1-三卤代-4-甲基-4-戊烯-2-醇的热异构化制备1,1,1-三卤代-4-甲基-3-戊烯-2-醇。 异构化反应可以通过元素周期表第6B,7B或8族的酸或过渡金属或其化合物催化。 由此制备的1,1,1-三卤代-4-甲基-3-戊烯-2-醇可用作除草剂或生理活性化合物的增效剂,另外可用作合成2的起始原料 ,2-二甲基-3-(2',2'-二卤代乙烯基) - 环丙烷羧酸酯,它们是杀虫剂的活性成分。

    Allenic esters, process for preparation thereof and process for
rearrangement thereof
    17.
    发明授权
    Allenic esters, process for preparation thereof and process for rearrangement thereof 失效
    烯酸酯,其制备方法及其重排方法

    公开(公告)号:US3978100A

    公开(公告)日:1976-08-31

    申请号:US461977

    申请日:1974-04-18

    IPC分类号: C07C69/587 C11C3/02

    摘要: Allenic esters of the formula: ##EQU1## (specific examples of R, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are given) and a process for the preparation thereof which comprises reacting propargyl alcohol derivatives with 2-substituted ortho-acetic acid esters in the presence of an acidic catalyst. These allenic esters are rearranged in the presence of an alkali catalyst to form .alpha., .beta., .gamma., .delta.-unsaturated carboxylic acid esters and are useful as intermediates in the synthesis of various perfumes, medicines, agricultural chemicals and the like.

    摘要翻译: 式R 2 R 1 R 4的酰亚胺酯R 3 -C = C = C-CH-COOR(R,R 1,R 2,R 3和R 4的具体实例)及其制备方法,其包括使炔丙醇衍生物 与2-取代的原乙酸酯在酸性催化剂存在下反应。 这些烯酸酯在碱催化剂存在下重排,形成α,β,γ,δ-不饱和羧酸酯,可用作合成各种香料,药物,农药等的中间体。

    Organic halide
    19.
    发明授权
    Organic halide 失效
    有机卤化物

    公开(公告)号:US3996303A

    公开(公告)日:1976-12-07

    申请号:US479413

    申请日:1974-06-14

    摘要: An organic halide (1) having the general formula: ##STR1## wherein X is a halogen atom, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 is a hydrogen atom, a hydrocarbon group or a halogenated hydrocarbon group, R.sup.1 may be a group having the formula: ##STR2## wherein R is an aliphatic, alicyclic or aromatic radical, and R.sup.3 and R.sup.4 may be a group consisting of -CH.sub.2 OH or its esters; is produced by reacting an organic halide (2) having the formula: ##STR3## wherein X, R.sup.1 and R.sup.2 is the same as above, respectively; with the compound having the formula: ##STR4## wherein R.sup.3 and R.sup.4 is the same as above, respectively, in the presence of a cationic catalyst at the temperature of from -78.degree. C. to 80.degree. C.

    摘要翻译: 具有以下通式的有机卤化物(1):其中X是卤素原子,R1,R2,R3和R4是氢原子,烃基或卤代烃基,R1可以是具有式 :其中R是脂族,脂环族或芳族基团,R 3和R 4可以是由-CH 2 OH或其酯组成的组; 通过使具有下式的有机卤化物(2)反应来制备:其中X,R 1和R 2分别与上述相同; 在-78℃至80℃的温度下,在阳离子催化剂存在下,分别具有下式的化合物:其中R 3和R 4与上述相同。