33.
    发明专利
    未知

    公开(公告)号:DE59001156D1

    公开(公告)日:1993-05-13

    申请号:DE59001156

    申请日:1990-05-26

    Applicant: BASF AG

    Abstract: The muscone of the formula I is prepared by bringing open-chain 2,15-diketones of the general formula II CH3-CO-X-CO-CH3 (II> in which X represents one of the radicals -(-CH2-)@(a> -CH=CH-(-CH2-)@CH=CH- (b> -CH2-CH=CH-(-CH2-)@CH=CH-CH2- (c> -CH2-CH2-CH=CH-(-CH2-)@CH=CH-CH2-CH2- (d) or -CH2-CH2-CH2-CH=CH-(-CH2-)@CH=CH-CH2-CH2-CH2- (e), into contact at temperatures of 300 to 400 DEG C in the presence of 5 to 15 % by weight of water, relative to the amount of catalyst, in the gas phase over a fixed-bed catalyst which contains TiO2, CeO2 or ThO2 as the catalytically active compound and hydrogenating catalytically the unsaturated cyclic ketone formed in this reaction by intramolecular aldol condensation. Furthermore, the open-chain unsaturated ketones of the formulae IIb, IIc and IId and advantageous processes for their preparation and their use as intermediates for a simple industrial muscone synthesis are claimed.

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