Methods for preparing epoxides
    3.
    发明申请
    Methods for preparing epoxides 审中-公开
    环氧化物的制备方法

    公开(公告)号:US20080114193A1

    公开(公告)日:2008-05-15

    申请号:US11985381

    申请日:2007-11-15

    IPC分类号: C07C31/34

    摘要: The invention includes methods for preparing halohydrins and epoxides. A method of preparing halohydrins can include exposing (R1CHXCH2O—)2SO2 to R2COOH to produce R2COOCH2CHXR1 and hydrolyzing the R2COOCH2CHXR1 to produce the halohydrin R1CHXCH2OH. R1 and R2 can be the same or different single elements and/or organic groups and X can be a halogen. A method of preparing an epoxide can include combining a sulfuric acid containing solution with a halogen to produce a first mixture and exposing the first mixture to trifluoropropene to produce a second mixture. The second mixture can be combined with acetic acid to produce an acetyl halohydrin of trifluoropropene and the acetyl halohydrin can be hydrolyzed to form a halohydrin of trifluoropropene. The halohydrin can be converted to a trifluoropropyl epoxide.

    摘要翻译: 本发明包括制备卤代醇和环氧化物的方法。 制备卤代醇的方法可以包括将(R 1)CH 2 CH 2 CH 2 CH 2 CH 2 CH 2 CH 2 CH 2 R 2, SUP> 2 COOH以产生R 2 COOCH 2 CHXR 1,并水解R 2 COOCH 2 CHXR 1以制备卤代醇R 1 CH 2 CH 2 OH。 R 1和R 2可以是相同或不同的单元素和/或有机基团,X可以是卤素。 制备环氧化物的方法可以包括将含硫酸的溶液与卤素组合以产生第一混合物,并将第一混合物暴露于三氟丙烯以产生第二混合物。 第二混合物可以与乙酸组合以产生三氟丙烯的乙酰基卤代醇,并且可以水解乙酰基卤代醇以形成三氟丙烯的卤代醇。 卤代醇可以转化为三氟丙基环氧化物。

    Preparation of halogenovinyl-.gamma.-butyrolactones
    7.
    发明授权
    Preparation of halogenovinyl-.gamma.-butyrolactones 失效
    卤代乙烯基-γ-丁内酯的制备

    公开(公告)号:US4215050A

    公开(公告)日:1980-07-29

    申请号:US949356

    申请日:1978-10-06

    申请人: Reinhard Lantzsch

    发明人: Reinhard Lantzsch

    摘要: Halogenovinyl-.gamma.-butyralactones, used as intermediates in the preparation of insecticidally active cyclopropanecarboxylic acid esters, and of the formula ##STR1## in which Hal represents F, Cl or Br,X represents H, F, Cl or Br andR.sup.1 and R.sup.2, which may be identical or different, each represents C.sub.1-4 -alkyl or R.sup.1 and R.sup.2, together with the adjacent C atom, form a cycloaliphatic ring with up to 7 C atoms,are produced by basic de-acetylation of the novel corresponding .alpha.-acetyl compounds. Syntheses are given for preparing the acetyl compounds, including novel intermediates of the formulas ##STR2##

    摘要翻译: 用作制备杀虫活性环丙烷羧酸酯的中间体的卤代乙酰基-γ-丁内酯,其中Hal代表F,Cl或Br的式“IMAGE”,X表示H,F,Cl或Br,R 1和R 2, 其可以相同或不同,各自表示C 1-4 - 烷基或R 1和R 2以及相邻的C原子形成具有高达7个C原子的脂环族环,其通过新型相应的α- 乙酰化合物。 给出了制备乙酰基化合物的合成,包括式(IMAGE)的新型中间体