34.
    发明专利
    未知

    公开(公告)号:DE59010296D1

    公开(公告)日:1996-05-30

    申请号:DE59010296

    申请日:1990-07-21

    Applicant: BASF AG

    Abstract: Polyethercarboxylic esters of the formula I where Alk is alkyl of 1 to 8 carbon atoms, R is hydrogen or methyl and n is from 3 to 70.

    39.
    发明专利
    未知

    公开(公告)号:DE4026788A1

    公开(公告)日:1992-02-27

    申请号:DE4026788

    申请日:1990-08-24

    Applicant: BASF AG

    Abstract: Process for the production of alpha , alpha -dialkoxyketones of the general formula I in which R and R independently of one another are hydrogen, C1- to C20-alkyl, C3- to C20-cycloalkyl, C4- to C30-cycloalkylalkyl, C9- to C30-alkylcycloalkyl, or optionally C1- to C8-alkyl-, C1- to C8-alkoxy-, halogen-, C1- to C4-haloalkyl-, C1- to C4-haloalkoxy-, phenyl-, phenoxy-, halophenyl-, halophenoxy- and/or cyano-substituted aryl, C7- to C20-aralkyl or heterocycle, R is additionally R and R independently of one another are C1- to C20-alkyl, C3- to C20-cycloalkyl, aryl, C7- to C20-arylalkyl, or together are a C2- to C7-alkylene chain which is optionally substituted by C1- to C4-alkyl, and R is R or together with R is a C2- to C7-alkylene chain which is optionally substituted by C1- to C4-alkyl, by reacting ketones or aldehydes of the general formula II with nitrites of the general formula III R -(NO2)n (III> in which n is 1 or 2, and n is 2 if R and R together represent a C2- to C7-alkylene chain which is optionally substituted by C1- to C4-alkyl, with the proviso that the nitrite groups are terminal, or with a mixture of alcohol of the general formula IV R -(OH)n IV in which n is 1 or 2, and n is 2 if R and R together represent a C2- to C7-alkylene chain which is optionally substituted by C1- to C4-alkyl, with the proviso that the hydroxyl group is terminal, and with dinitrogen trioxide in a molar ratio of 2:1 in the presence of an acid catalyst, at temperatures from 0 to 170 DEG C.

Patent Agency Ranking