19.
    发明专利
    未知

    公开(公告)号:BR8503875A

    公开(公告)日:1986-05-27

    申请号:BR8503875

    申请日:1985-08-15

    Applicant: BASF AG

    Abstract: 1. A cyclohexenone derivative of the formula I see diagramm : EP0172502,P12,F2 where A is a cycloalkyl radical of 5 to 12 ring members which is fused with one or two oxirane or thiirane rings, is unsubstituted or substituted by not more than four methyl groups and/or is bridged with an alkylene chain of not more than 3 carbon atoms, R**1 is hydrogen, methoxycarbonyl or cyano, R**2 is alkyl of 1 to 4 carbon atoms and R**3 is alkyl of 1 to 3 carbon atoms, alkenyl of 3 or 4 atoms, haloalkenyl of 3 or 4 carbon atoms which has 1, 2 or 3 halogen substituents or propargyl, or a salt thereof.

    PROCESS FOR PREPARING 3-FORMYL-TETRAHYDRO-THIOPYRANS

    公开(公告)号:HUT38098A

    公开(公告)日:1986-04-28

    申请号:HU349484

    申请日:1984-09-17

    Applicant: BASF AG

    Abstract: 3-Formyltetrahydrothiopyrans are prepared by hydrogenating a 3-formyl-5,6-dihydro-2H-thiopyran in the presence of a catalyst containing nickel, cobalt, platinum, copper and/or silver; if necessary, the 3-formyl-5,6-dihydro-2H-thiopyrans are prepared by converting bis-( beta -formylethyl) sulfides and/or 3-formyl-4-hydroxytetrahydrothiopyrans in the presence of an acidic catalyst, and, if required, these bis-( beta -formylethyl) sulfides and/or 3-formyl-4-hydroxytetrahydrothiopyrans are prepared by reacting an acrolein with hydrogen sulfide (a) in the presence of a basic catalyst and of methylene chloride, aromatic hydrocarbons and/or 1,1,2-trichloroethane as solvents, and/or (b) in the presence of a carboxamide. The compounds obtainable by the process according to the invention are useful starting materials for the preparation of dyes, drugs and pesticides.

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