3.
    发明专利
    未知

    公开(公告)号:ES2097375T3

    公开(公告)日:1997-04-01

    申请号:ES93101799

    申请日:1993-02-05

    Applicant: HOECHST AG

    Abstract: Fluoro-substituted epoxides of the general formula in which the substituents R1 to R4 independently of one another have the following meaning: R1 to R4 = H, fluorine, C1- to C18-alkyl, in which a part of all the hydrogens can be substituted by fluorine, and at least one of the substituents R1 to R4 is a completely fluorinated alkyl or an alkyl of the formula -(CH2)m-(CnF2n+1), in which m represents 1 or 2 and n represents an integer from 1 to 17, and x represents 0 or 1. A process for the preparation of fluoro-substituted epoxides is additionally given.

    4.
    发明专利
    未知

    公开(公告)号:ES2093342T3

    公开(公告)日:1996-12-16

    申请号:ES93114314

    申请日:1993-09-07

    Applicant: HOECHST AG

    Abstract: 1-Indanones of the formula IV or IVa in which R to R preferably denote hydrogen or alkyl or adjacent radicals R to R form a ring are obtained in a one-step reaction by reacting a compound I with a compound of the formula II or with a compound of the formula III with boron trifluoride in anhydrous hydrogen fluoride.>

    8.
    发明专利
    未知

    公开(公告)号:BR9201627A

    公开(公告)日:1992-12-15

    申请号:BR9201627

    申请日:1992-04-30

    Applicant: HOECHST AG

    Abstract: The invention relates to a process for preparing polycarboxylic acids and their derivatives, the polycarboxylic acids prepared containing at least three carboxyl groups, and comprises the following steps: (A) introducing one or more organic compounds, which do not contain aromatic carbon-carbon (C-C) double bonds, into water, (B) ozonolysis of the organic compounds in water by passing in an ozone-containing carrier gas, (C) addition of aqueous hydrogen peroxide solution in order to work up the ozonolysis products formed in step (B) by oxidation, characterised in that the organic compound(s) is (are) introduced, in step (A), into water having a pH of 7 or less than 7, and in that the addition of hydrogen peroxide in step (C) in water is effected without addition of an organic solvent.

    9.
    发明专利
    未知

    公开(公告)号:ES2110125T3

    公开(公告)日:1998-02-01

    申请号:ES94100015

    申请日:1994-01-03

    Applicant: HOECHST AG

    Abstract: The present invention relates to compounds of the formula in which R and R are identical or different and stand for hydrogen or an alkyl radical having 1 to 18 carbon atoms optionally containing oxygen, nitrogen or halogen, the radicals X, Y and Z are identical and stand for a fluorine, bromine or iodine atom or, if two of the radicals X, Y or Z are identical or all the radicals X, Y and Z are different from one another, X, Y and Z denote a fluorine, chlorine, bromine or iodine atom. The invention further relates to a process for the preparation of the compounds by reacting an aryldiazonium salt of the formula in which the radicals X, Y and Z are identical and stand for a fluorine, bromine or iodine atom or, if two of the radicals X, Y and Z are identical or all the radicals X, Y and Z are different from one another, X, Y and Z denote a fluorine, chlorine, bromine or iodine atom and A denotes an anion of an acid having a pKa of in which R and R are identical or different and stand for hydrogen or an alkyl radical having 1 to 18 carbon atoms optionally containing oxygen, nitrogen or halogen, in the presence of a palladium-containing catalyst, if appropriate with addition of a base, and to the aryldiazonium salts of the formula (II).

Patent Agency Ranking