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    • 98. 发明授权
    • Method of preparing 2-trifluoromethoxy-benzenesulphonamide
    • 制备2-三氟甲氧基 - 苯磺酰胺的方法
    • US5925788A
    • 1999-07-20
    • US68778
    • 1998-05-14
    • Reinhard LantzschAlbrecht MarholdErnst Kysela
    • Reinhard LantzschAlbrecht MarholdErnst Kysela
    • B01J21/18B01J23/44C07B61/00C07C303/40C07C309/87C07C311/29C07C303/00
    • C07C311/29C07C303/40C07C309/87
    • 2-Trifluoromethoxy-benzenesulphonamide, of the formula (I), ##STR1## which can be used as intermediate for the preparation of certain herbicidally active compounds is obtained in very high yield and high purity by a process in which halogenated trifluoromethoxy-benzenesulphonamides of the general formula (II) ##STR2## in which X.sup.1 represents halogen and X.sup.2 represents hydrogen or halogenare reacted with hydrogen in the presence of a catalyst and in the presence of a diluent and, if appropriate, in the presence of an acid acceptor at temperatures between 0.degree. C. and 200.degree. C. ("dehalogenated"), the resulting compound of the formula (I) is isolated in the customary manner in the event that "X.sup.2 =halogen" and converted into a pure, crystalline product by treating it with a protic polar organic liquid and isolated by removing the liquid component by means of filtration with suction in the event that "X.sup.2 =H".
    • PCT No.PCT / EP96 / 04895 371日期:1998年5月14日 102(e)日期1998年5月14日PCT提交1996年11月8日PCT公布。 公开号WO97 / 19056 PCT 日期:19972年5月29日 - 可以用作制备某些除草活性化合物的中间体的式(I)的三氟甲氧基 - 苯磺酰胺以非常高的产率和高纯度通过以下方法获得:其中卤代三氟甲氧基 - 苯磺酰胺 其中X 1表示卤素且X 2表示氢或卤素的通式(II)在氢气存在下,在催化剂存在下,在稀释剂存在下,在适当的情况下,在酸受体存在下,在0℃ 在“X2 =卤素”的情况下,以通常的方式分离得到的式(I)化合物,并将其转化为纯的结晶产物,通过用 通过在“X2 = H”的情况下通过抽吸过滤除去液体组分而分离的质子极性有机液体。
    • 100. 发明授权
    • Process for the preparation of chloromethylpyridines
    • 氯甲基吡啶的制备方法
    • US5623076A
    • 1997-04-22
    • US573714
    • 1995-12-18
    • Reinhard Lantzsch
    • Reinhard Lantzsch
    • C07B39/00C07D213/61C07D213/26C07D213/38
    • C07D213/61
    • The invention relates to a new process for the preparation of chloromethylpyridines of the general formula (I) ##STR1## in which X.sup.1 represents hydrogen, halogen or alkyl,characterized in that pyridine derivatives of the general formula (II) ##STR2## in which R.sup.1 and X.sup.1 have the meaning given in the description,are reacted by means of a formamide derivative of the general formula (III) ##STR3## in which R.sup.2 and R.sup.3 are identical or different and represent alkyl or cycloalkyl or together represent alkanediyl,and with a chlorinating agent, if appropriate in the presence of a diluent, at temperatures between 20.degree. and 120.degree. C. The invention furthermore relates to new pyridine derivatives of the formula (II) and their preparation.
    • 本发明涉及一种制备通式(I)的化合物(I)的新方法,其中X 1表示氢,卤素或烷基,其特征在于通式(Ⅱ)的吡啶衍生物 描述通过通式(III)的甲酰胺衍生物(III)进行反应,其中R2和R3相同或不同,代表烷基或环烷基或一起代表烷二基,并与氯化剂反应,如果 适宜于稀释剂存在下,在20至120℃的温度下进行。本发明还涉及新的式(Ⅱ)吡啶衍生物及其制备方法。