16.
    发明专利
    未知

    公开(公告)号:DE2216974A1

    公开(公告)日:1973-10-11

    申请号:DE2216974

    申请日:1972-04-08

    Applicant: BASF AG

    Abstract: A process for the production of high molecular weight unsaturated ketones by alkylation of low molecular weight alpha , beta -unsaturated ketones with an allyl alcohol at elevated temperature in the presence of an acid catalyst. The products are intermediates for the production of various natural substances and perfumes such as the damascenones, damascones or natural dyes such as zeaxanthin, rhodoxanthin or xanthophyll.

    Alpha,beta-unsatd aldehydes branched in alpha - position - by catalysed alkylation of unsatd alcohols

    公开(公告)号:DE2212948A1

    公开(公告)日:1973-09-20

    申请号:DE2212948

    申请日:1972-03-17

    Applicant: BASF AG

    Abstract: Alpha, beta-unsatd. aldehydes branched in alpha-position and having formula (Ia) or (Ib) (where R1-7 are H, (cyclo)aliph. or cycloaliph.-aliph. hydrocarbons, are prepd. by reacting and alpha, beta-unsatd. alcohol of formula (II), in liquid phase, at 110-250 degrees C, under 0-250 ats, in presence of 0.01-5% based on the sum of wts. of reactants, of an acid having pK 3-6, or in presence of a concn. aq. soln. of H2O2 or an org. peroxy cpd., with an alpha, beta-unsatd. alcohol of formula (IIIa) or (IIIb). Prods. are obtd. in high yield, and even rel. unstable aldehydes prone to autocondensn. may be used. Prods may be used in scent mfre.

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