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    2.
    发明专利
    未知

    公开(公告)号：ES2077092T3

    公开(公告)日：1995-11-16

    申请号：ES91104410

    申请日：1991-03-21

    Applicant: BASF AG

    Inventor： MERGER FRANZ DR ,  PRIESTER CLAUS-ULRICH DR ,  WITZEL TOM DR ,  KOPPENHOEFER GERHARD DR ,  SCHUSTER LUDWIG DR

    IPC: B01J23/40 ,  B01J23/74 ,  B01J29/06 ,  C07B61/00 ,  C07C209/48 ,  C07C211/09 ,  C08G69/00 ,  C08G73/02

    Abstract: Process for the preparation of 2,2-disubstituted pentane-1,5-diamines of the general formula I … … in which the substituents R and R , independently of one another, denote C1- to C10-alkyl, C2- to C10-alkenyl or together represent a C4- to C7-alkylene chain which is unsubstituted or substituted by one to five C1- to C4-alkyl groups, from 2,2-disubstituted 4-cyanobutanals of the general formula II … … in which the substituents R and R have the abovementioned meanings, by carrying out the reaction in two reaction spaces spatially separated from one another by …… a) reacting the 4-cyanobutanals of the formula II in a first reaction space with excess ammonia over acidic heterogeneous catalysts at temperatures of 20 to 150 DEG C and pressures of 15 to 500 bar and … b) hydrogenating the reaction products formed in a second reaction space with excess hydrogen in the presence of excess ammonia over cobalt-, nickel-, ruthenium- and/or other noble metal-containing catalysts, which may contain basic components or are arranged on basic or neutral supports at temperatures of 60 to 150 DEG C and pressures of 50 to 500 bar, and novel 2,2-disubstituted pentane-1,5-diamines of the general formula I' …… … in which the substituents R and R , independently of one another, denote C1- to C10-alkyl, C2- to C10-alkenyl or together represent a C4- to C7-alkylene chain which is unsubstituted or substituted by one to five C1- to C4-alkyl groups with the proviso that R and R do not simultaneously denote methyl.

    Salicylaldehyde prodn. - by ozonisation of o-propenyl-phenol, followed by redn. of the ozonisation prod.
    8.
    发明专利
    Salicylaldehyde prodn. - by ozonisation of o-propenyl-phenol, followed by redn. of the ozonisation prod. 未知

    公开(公告)号：DE4104835A1

    公开(公告)日：1991-08-29

    申请号：DE4104835

    申请日：1991-02-16

    Applicant: BASF AG

    Inventor： SCHUSTER LUDWIG DR ,  HARREUS ALBRECHT DR ,  EICKEN KARL DR

    IPC: C07C45/40

    Abstract: Process for prodn. of salicylaldehyde (I) comprises ozonisation of o-propenylphenol (II), followed by redn. of the prod. (II) is obtd. by reaction of allyl chloride with phenol, followed by Claisen rearrangement of the phenyl allyl ether obtd., and isomerisation; ozonisation is carried out pref. at -30 to -60 deg.C, in protic solvent (alcohols, acids) to give the aldehyde and the hydroperoxy-acetal of acetaldehyde, or in non-protic solvents to give ozonides; these intermediates are then reduced, pref. with Me2S. USE/ADVANTAGE - Provides a simple process for the prodn. of (I) in good yield; prior-art processes give low yields of (I) and large amts. of environmentally harmful by-prods. In an example, a stream of oxygen (200 l/hr.) contg. ozone (28 g/hr.) was passed into a soln. of 134g (1 mol.) (II) in 1370 ml methanol at -60 deg.C, for 100 mins.; 110 ml Me2S was then added, and the mixt. was refluxed for 1 hr. until the peroxide content was reduced to 0.035 mol., after which it was worked up by distn. to give Me2S, methanol and 181g of a fraction contg. 68% (I) and DMSO; this fraction was mixed with 200 ml toluene and extd. with 4 x 100 ml water to remove the DMSO, then redistilled to give 109g (I) (89.3% yield).

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