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237 records (took 0.022 seconds)

    202.
    发明专利
    未知

    公开(公告)号：DE4008694A1

    公开(公告)日：1991-09-19

    申请号：DE4008694

    申请日：1990-03-17

    Applicant: BASF AG

    Inventor： HUELLMANN MICHAEL DR ,  MAYR HERBERT PROF DR ,  BECKER RAINER DR

    IPC: B01J31/26 ,  C07B61/00 ,  C07C2/00 ,  C07C2/72 ,  C07C13/48

    Abstract: A process for preparing 1,1,3,4,4,6-hexamethyl-1,2,3,4-tetrahydronaphthalene of the formula I (I) comprises reacting p-cymene of the formula II (II) with a hexene of the formula IIIa, IIIb and/or IIIc (IIIa) (IIIb) (IIIc) in the presence of a catalytic amount of aluminum halide and a catalytic amount of a triphenylmethyl compound of the formula IV (IV) wherein R1, R2 and R3 are each, independently of one another, hydrogen, C1-C4-alkyl, nitro or halogen and X is hydrogen or halogen.

    Prepn. of trans-alkenol(s) from Wittig reaction of cyclic lactam(s) - without isolation of phosphonium salt and with isomerisation thermally or by irradiation
    203.
    发明专利
    Prepn. of trans-alkenol(s) from Wittig reaction of cyclic lactam(s) - without isolation of phosphonium salt and with isomerisation thermally or by irradiation 未知

    公开(公告)号：DE4006919A1

    公开(公告)日：1991-09-12

    申请号：DE4006919

    申请日：1990-03-06

    Applicant: BASF AG

    Inventor： SEUFERT WALTER DR ,  BUSCHMANN ERNST DR ,  BECKER RAINER DR ,  SEPPELT WOLFGANG DR ,  MACKENROTH WOLFGANG DR ,  KLEIN ULRICH DR

    IPC: C07C29/44 ,  C07C29/56

    Abstract: Prepn. of trans-alkenols of formula HAC=CH(CH2)nCH20H (I) comprises: (a) reaction of an alkanol of formula ACH20H (II), a term phosphine and a hydrogen halide to give a phosphonium salt of formula (III); (b) reaction of unisolated (III) with a base and a cyclic hemiacetal of formula (IV) to give a cis/trans-alkenol mix; and (c) rearrangement of the mixt. thermally or by irradiation (250-450nm) to give (I), chiefly as the trans-isomer. A = 1-16C alkyl; n = 2 or 3; R = organic gp Also claimed is a prepn. of acetate derive of (I) which comprises esterification of (I) with 0Ac0H or a derive, before or after step (c). Pref trans-dec-5-enol (Ia) and trans-tridec-4-enol (Ib). The phosphine is PPh3. Esterification takes place prior to isomerisation and the isomerisation (where esterification is carried out) is thermal. USE/ADVANTAGE - Acetylated derivs. of (Ia) and (Ib) are phenomones which may be used as pesticides. The process does not require expensive or sensitive reagents or isolation of (III) (see eg Helv Chim Actor 60, 1161 (1977)). (6pp Dwg.No.0/0)

    207.
    发明专利
    未知

    公开(公告)号：DE3938468A1

    公开(公告)日：1991-05-23

    申请号：DE3938468

    申请日：1989-11-18

    Applicant: BASF AG

    Inventor： GUEMBEL HELMUT DR ,  PAUST JOACHIM DR ,  SPERLING-VIETMEIER KARIN DR ,  BECKER RAINER DR

    IPC: A61K8/00 ,  A61K8/35 ,  A61K8/41 ,  A61K8/49 ,  A61Q17/04 ,  C07C49/255 ,  C07C69/618 ,  C07D317/26 ,  C07D317/44 ,  C07D319/06 ,  C07D321/00 ,  C07D407/06

    Abstract: 1,1-Dialkoxy-2-oxo-6-aryl-3,5-alkadienes of the general formula I I where Ar is a phenyl, biphenyl or naphthyl radical which may be substituted by one, two or three C1-C4-alkyl groups, C1-C4-alkoxy groups, hydroxyl groups, phenoxy groups, amino groups which may be mono- or di-C1-C4-alkyl-substituted, halogen atoms or a methylenedioxy group, the substituents being identical or different, R1 is hydrogen or C1-C8-alkyl, R2 is hydrogen, C1-C4-alkyl, C1-C10-alkoxycarbonyl or C1-C10-acyl, the radicals R3 are C1-C8-alkyl groups which may be bonded to one another with formation of a five-membered or six-membered ring and R4 is hydrogen or C1-C4-alkyl, are used as sunscreen agents in cosmetic preparations.

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