Insecticidal esters
    5.
    发明授权
    Insecticidal esters 失效
    杀虫剂

    公开(公告)号:US4091110A

    公开(公告)日:1978-05-23

    申请号:US786394

    申请日:1977-04-11

    申请人: Nazim Punja

    发明人: Nazim Punja

    CPC分类号: C25B3/04 A01N37/10

    摘要: Compounds of the formula ##STR1## wherein R.sup.1 represents a branched lower alkyl radical; R.sup.2 represents a phenyl group optionally substituted with halogeno or lower alkyl radicals; R.sup.3 and R.sup.4 represent halogeno radicals; and R.sup.5 represents a hydrogen atom or the cyano radical. These compounds are useful as insecticides.

    摘要翻译: 其中R 1表示支链低级烷基的式“IMAGE”的化合物; R 2表示任选被卤代或低级烷基取代的苯基; R3和R4代表卤代基; R 5表示氢原子或氰基。 这些化合物可用作杀虫剂。

    Lactones
    6.
    发明授权
    Lactones 失效
    内酯

    公开(公告)号:US4310464A

    公开(公告)日:1982-01-12

    申请号:US702732

    申请日:1976-07-06

    摘要: 4-.beta., .beta.-dichlorovinyl (or dibromovinyl)-3,3-dimethylbutyrolactones are prepared from 1,1-dichloro (or dibromo)-4-methylpenta-1,3-diene by reacting with an acid of formula CH.sub.2 R.CO.sub.2 H in presence of a salt of a metal in one of its higher valency states, especially manganese (III), cerium (IV), or vanadium (V). Higher yields are obtained in the presence of the anhydride of the acid and of the sodium or potassium salt of the acid. Treatment of the lactones with an inorganic acid halide opens the lactone ring with formation of the corresponding 4-haloacid halide, which with alcohols affords the corresponding 4-haloacid ester, cyclised by bases to a 3-.beta.,.beta.-dichloro (or dibromo)vinyl-2,2-dimethylcyclopropanecarboxylic ester, intermediate for insecticides such as the m-phenoxybenzyl ester.

    摘要翻译: 由1,1-二氯(或二溴)-4-甲基戊-1,3-二烯通过与式CH2R.CO2H的酸反应制备4-β,β-二氯乙烯基(或二溴乙烯基)-3,3-二甲基丁内酯 在其较高价态之一,特别是锰(III),铈(IV)或钒(V)之一中存在金属盐。 在酸的酸酐和酸的钠盐或钾盐的存在下获得更高的产率。 用无机酰卤处理内酯,形成相应的4-卤代卤化物,使其与醇反应,形成相应的4-卤代酸酯,通过碱环化为3-β,β-二氯(或二溴) 乙烯基-2,2-二甲基环丙烷羧酸酯,间苯氧基苄基酯等杀虫剂的中间体。