3.
    发明专利
    未知

    公开(公告)号:CH624918A5

    公开(公告)日:1981-08-31

    申请号:CH141376

    申请日:1976-02-05

    Applicant: BASF AG

    Abstract: A process for the manufacture of 2,6,6-trimethyl-cyclo-hex-2-en-1-one by reacting 3-alkoxy-4-methyl-3-pentene or 3-alkoxy-4-methyl-2-pentene or a mixture of these compounds with acrolein, and reacting the resulting 2-alkoxy-2-ethyl-3,3-dimethyl-2,3-dihydro-4H-pyran with acids. The product is an intermediate for numerous syntheses of scents. Furthermore, a number of carotenoid syntheses are based on 2,6,6-trimethyl-cyclohex-2-en-1-one or its hydrogenation product, 2,6,6-trimethyl-cyclohexan-1-one.

    9.
    发明专利
    未知

    公开(公告)号:CH602552A5

    公开(公告)日:1978-07-31

    申请号:CH984576

    申请日:1976-08-02

    Applicant: BASF AG

    Abstract: A process for the manufacture of alpha , beta , gamma , delta -unsaturated esters containing a very high proportion of the 4(Z)-isomer, which are valuable perfume and flavor materials. The alpha , beta , gamma , delta -unsaturated esters are manufactured by a Wittig synthesis from phosphoranes and fumaraldehyde-acid esters under specific conditions.

    10.
    发明专利
    未知

    公开(公告)号:DE19533665C2

    公开(公告)日:1997-09-18

    申请号:DE19533665

    申请日:1995-09-12

    Applicant: BASF AG

    Abstract: The prodn. of an alkylphenol of formula (I) comprises reacting corresp. alkyl-cyclohex-2- en-1-one of formula (II) at 200-400 degrees C and 0.01-50 bar in presence of a supported Pd/ alpha -alumina catalyst (III) with a specific surface (BET) of 1-10 m /g, a pore dia. of 5 nm to 300 microns and a pore vol. of 0.1-0.5 cm /g, in which 80-100% of the pores have a dia. of 40-400 nm. R1-R5 = H or 1-8C alkyl. Also claimed are catalysts (III) as such.

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