Process for the preparation of 2,4,6-trifluoro-1,3,5-triazine
    1.
    发明授权
    Process for the preparation of 2,4,6-trifluoro-1,3,5-triazine 失效
    制备2,4,6-三氟-1,3,5-三嗪的方法

    公开(公告)号:US4329458A

    公开(公告)日:1982-05-11

    申请号:US238328

    申请日:1981-02-26

    CPC classification number: C07D251/28

    Abstract: The present invention relates to a process for the preparation of 2,4,6-trifluoro-1,3,5-triazine (TFT) from 2,4,6-trichloro-1,3,5-triazine (TCT) or from mixed chlorinated/fluorinated 1,3,5-triazines by fluorination with sodium fluoride in dipolar aprotic solvents.The process is characterized in that TCT or mixed chlorinated/fluorinated 1,3,5-triazines or mixtures thereof are metered into a suspension of sodium fluoride in a dipolar, aprotic solvent, which is warmed to a temperature of between 120.degree. C. and 220.degree. C. and optionally contains a further solvent.

    Abstract translation: 本发明涉及从2,4,6-三氯-1,3,5-三嗪(TCT)制备2,4,6-三氟-1,3,5-三嗪(TFT)或从 混合氯化/氟化1,3,5-三嗪通过氟化氟化物在偶极非质子溶剂中氟化。 该方法的特征在于将TCT或混合氯化/氟化1,3,5-三嗪或其混合物计量加入到氟化钠在偶极非质子溶剂中的悬浮液中,将其温热至120℃至 220℃,任选地含有另外的溶剂。

    Preparation of new fluoropivalic acid fluorides
    3.
    发明授权
    Preparation of new fluoropivalic acid fluorides 失效
    新氟氟酸氟化物的制备

    公开(公告)号:US4549994A

    公开(公告)日:1985-10-29

    申请号:US630490

    申请日:1984-07-13

    CPC classification number: C07C53/50 C07C51/58

    Abstract: A process for the preparation of a compound according to claim 1, comprising reacting a compound of the formula ##STR1## in which R.sup.3, R.sup.4 and R.sup.5 each independently is CH.sub.3 or CH.sub.2 Cl, at least one of the radicals R.sup.3, R.sup.4 and R.sup.5 being CH.sub.2 Cl,with a metal fluoride at elevated temperature. The products are new and useful as intermediates for making other compounds, especially carbamate insecticide synergists.

    Abstract translation: 一种制备根据权利要求1的化合物的方法,包括使下式化合物(其中R 3,R 4和R 5各自独立地为CH 3或CH 2 Cl)反应,基团R 3,R 4和R 5中的至少一个为CH 2 Cl ,在高温下用金属氟化物。 该产品作为制备其他化合物,特别是氨基甲酸酯杀虫剂增效剂的中间体是新的和有用的。

    Preparation of 3-bromo-4-fluorotoluene
    4.
    发明授权
    Preparation of 3-bromo-4-fluorotoluene 失效
    3-溴-4-氟甲苯的制备

    公开(公告)号:US4351974A

    公开(公告)日:1982-09-28

    申请号:US233413

    申请日:1981-02-11

    CPC classification number: C07C17/12

    Abstract: In the preparation of 3-bromo-4-fluorotoluene by reacting 4-fluorotoluene with bromine, the improvement which comprises effecting the bromination in glacial acetic acid in the presence of iodine and iron or an iron salt. As a result the proportion of 3-bromo-4-fluorotoluene relative to its 2-bromo-4-fluorotoluene isomer is markedly increased.

    Abstract translation: 在通过4-氟甲苯与溴反应制备3-溴-4-氟甲苯的过程中,其改进包括在碘和铁或铁盐存在下在冰醋酸中进行溴化。 结果,3-溴-4-氟甲苯相对于其2-溴-4-氟甲苯异构体的比例明显增加。

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