中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

437 records (took 0.022 seconds)

    141.
    发明专利
    未知

    公开(公告)号：DE3761139D1

    公开(公告)日：1990-01-18

    申请号：DE3761139

    申请日：1987-09-05

    Applicant: BASF AG

    Inventor： SPIEGLER WOLFGANG DR ,  HOELDERICH WOLFGANG DR ,  GOETZ NORBERT DR ,  HUPFER LEOPOLD DR ,  WILD JOCHEN DR

    IPC: A01N43/18 ,  B01J29/40 ,  B01J29/70 ,  B01J29/83 ,  B01J29/85 ,  B01J29/86 ,  C07D309/04 ,  C07D309/06 ,  C07D309/10 ,  C07D405/04 ,  C07D407/04 ,  C07D409/04 ,  C07D411/04

    Abstract: 4-Formyltetrahydropyrans of the general formula I (I) where R1 is hydrogen, C1-C12-alkyl, C2-C12-alkenyl, C1-C6-alkoxy-substituted C1-C12-alkyl, C4-C12-cycloalkyl, unsubstituted or substituted aryl, hetaryl or aralkyl, or an unsubstituted or substituted, saturated or unsaturated 5-membered or 6-membered ring which may be interrupted by N, O or S, are prepared by a process in which a pyran derivative of the general formula II (II) where R1 is as defined above, R2 and R3 are each OH or together are an oxygen atom and thus form an oxirane ring, and R4 is hydrogen where R2 and R3 are each OH, and is hydrogen or tert-butoxycarbonyl where R2 and R3 together are an oxygen atom, is treated at elevated temperatures with a catalyst selected from the group consisting of zeolites, phosphates, boric acid on a carrier and silica or mixtures of these. Novel 4-formyltetrahydropyrans are also proposed.

    144.
    发明专利
    未知

    公开(公告)号：DE3804162A1

    公开(公告)日：1989-08-24

    申请号：DE3804162

    申请日：1988-02-11

    Applicant: BASF AG

    Inventor： HOELDERICH WOLFGANG DR ,  GOETZ NORBERT DR ,  HUPFER LEOPOLD DR

    IPC: C07C41/28

    Abstract: A process for the preparation of vinyl ethers of the formula in which R to R are identical to or different from one another and represent hydrogen, straight-chain or branched alkyl or alkenyl radicals having up to 12 carbon atoms, cycloalkyl or cycloalkylene radicals having 5 to 8 carbon atoms, aryl, alkylaryl, alkenylaryl, aralkyl and aralkenyl radicals having 6 to 16 carbon atoms, halogen-substituted aryl radicals or heterocyclic radicals and the radicals R and R or R and R , together with the C atom to which they are bonded, can moreover form a cycloalkane, cycloalkene or a heterocycle, and R represents alkyl or alkylaryl or aralkyl radicals, in which alcohols are eliminated from acetals/ketals of the formula in which R to R have the above meaning, in the presence of phosphates having a zeolite structure and/or precipitated phosphates of the elements B, Zr, Ce, Fe and/or phosphoric acid or boric acid on a support material and/or acidic undoped metal oxides as catalysts. The reaction is preferably carried out in the gas phase.

    149.
    发明专利
    未知

    公开(公告)号：DE3643009A1

    公开(公告)日：1988-06-30

    申请号：DE3643009

    申请日：1986-12-17

    Applicant: BASF AG

    Inventor： BUSCHMANN ERNST DR ,  GOETZ NORBERT DR ,  ZIPPERER BERNHARD DR ,  AMMERMANN EBERHARD DR ,  POMMER ERNST-HEINRICH DR

    IPC: C07D295/02 ,  A01N43/34 ,  A01N43/84 ,  C07D265/30 ,  C07D295/033 ,  C07D295/08 ,  C07D521/00 ,  A01N33/04

    Abstract: 1. 4-Substituted cyclohexylamines of the formula I see diagramm : EP0271750,P8,F3 where R is the CR**1 R**2 R**3 group having a total of 6-20 carbon atoms, where R**1 , R**2 and R**3 are identical or different and are hydrogen, branched or a unbranched, unsubstituted or hydroxyl- or C6 -cycloalkyl-substituted C1 -C8 -alkyl, C1 -C8 -alkoxy, C1 -C8 -alkylthio or C3 -C6 -cycloalkyl, with the proviso that at most one of the substituents R**1 , R**2 and R**3 may be hydrogen, and where X is an alkylene group having from four to six carbon atoms which, together with the nitrogen atom, forms a 5- to 7- membered heterocyclic ring in which up to 2 carbon atoms may be replaced by oxygen, nitrogen or sulfur atoms and which may be substituted by from 1 to 3 straight-chain or branched alkyl or arylalkyl radicals, in each case having from 1 to 10 carbon atoms, and the salts thereof.

Patent Agency Ranking