Prepn. of butyl or butenyl carbonyl cpds.

    公开(公告)号:DE4003423A1

    公开(公告)日:1991-08-08

    申请号:DE4003423

    申请日:1990-02-06

    Applicant: BASF AG

    Abstract: Prepn. of unsatd. or satd. carbonyl cpds. of formula (I), some of which are claimed as novel cpds., is by reacting a 2-formyl-dihydropyran deriv. of formula (II) (opt. substd. by organic gps. in the 1-, 2-, 3- or 4-position) with a Gp. VIII metal (cpd.) catalyst at 100-400 deg.C to give the unsatd. cpds. and then conventionally hydrogenating the prod. should the satd. cpd. be required. In the formulae, R1 = buten-1-yl or but-1-yl opt. substd.; R2 = H or organic substit.. The cpds. claimed as novel are of formula (I) with R2 replaced by R2a where R1 is opt. substd. by R2a or R3; R2a = H or 1-20C alkyl opt. substd. by up to 3 R3 gps., but excluding unsubstd. Me or Et, where R3 = 3-12C cycloalkyl, phenyl, naphthyl, 5- or 6-membered (non)aromatic heterocycles (esp. pyridyl), 2-6C alkenyl, etc..

    64.
    发明专利
    未知

    公开(公告)号:DE3918015A1

    公开(公告)日:1990-12-06

    申请号:DE3918015

    申请日:1989-06-02

    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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