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    4-formyl amino-n-methylpiperidine derivatives, the use thereof as stabilisers and organic material stabilised therewith
    1.
    发明专利
    4-formyl amino-n-methylpiperidine derivatives, the use thereof as stabilisers and organic material stabilised therewith 未知

    公开(公告)号：AU5474701A

    公开(公告)日：2001-10-15

    申请号：AU5474701

    申请日：2001-03-28

    Applicant: BASF AG

    Inventor： HAREMZA SYLKE ,  KROCKENBERGER JURGEN ,  APPEL MANFRED ,  TRAUTH HUBERT ,  AUMULLER ALEXANDER

    IPC: C07D211/58 ,  C08K5/3435 ,  C08L101/00 ,  C09D7/12 ,  C09D201/00 ,  C08K5/34

    Abstract: Novel 4-Formylamino-N-methylpiperidine compounds are claimed. 4-Formylamino-N-methylpiperidine compounds (I) are of formula (1). [Image] Independent claims are included for: (i) a process for the preparation of piperidine compounds (I) by reaction of a compound of formula (2) with formaldehyde in an organic solvent, emulsion or suspension having a b.pt. of at least 70 [deg]C (at 1.013 bar) followed by reaction with formic acid at a temperature from at least 70 [deg]C to the b.pt. (at 1.013 bar) of the solvent, emulsifying or suspension agent; and (ii) a stabilized organic material containing the piperidine compound (I). R1>-R4>1-4C alkyl or R1> and R2> together or R3> and R4> together optionally form a tetramethylene or pentamethylene group; R5>H or 1-4C alkyl; n : 1 or 2; Y : H, 1-22C alkyl, 2-22C alkenyl, 3-12C cycloalkyl or bicycloalkyl, CN, OH, 1-4C alkoxycarbonyl substituted 1-22C alkyl, ether, nitrogen or sulfur linkage containing 4-22C alkyl optionally substituted by OH, 1-4C alkyl, F, Cl, 1-4C alkoxy or di(1-4C alkyl) amino substituted 7-22C phenyl or diphenylalkyl,. phenyl optionally substituted by 1-4C alkyl or 1-4C alkoxycarbonyl or a group of formula (3) or a heterocyclic group containing 1-22C alkyl when n is 1; Y : 1-22C alkylene, 5-22C cycloalkylene, 8-14C phenylalkylene, phenylene or 4-30C alkylene containing -O-, -N- or -S- linkage or a six membered heterocycle when n is 2.

    8.
    发明专利
    未知

    公开(公告)号：ES2171659T3

    公开(公告)日：2002-09-16

    申请号：ES96908047

    申请日：1996-03-15

    Applicant: BASF AG

    Inventor： KOCH ANDREAS ,  AUMULLER ALEXANDER ,  MITULLA KONRAD ,  TREMMEL GREGOR ,  HERBST HOLGER

    IPC: C07D211/58 ,  C07B63/04 ,  C07D211/94 ,  C07F9/59 ,  C09K15/22 ,  C09K15/30

    Abstract: PCT No. PCT/EP96/01122 Sec. 371 Date Sep. 22, 1997 Sec. 102(e) Date Sep. 22, 1997 PCT Filed Mar. 15, 1996 PCT Pub. No. WO96/29311 PCT Pub. Date Sep. 26, 19964-Acylaminopiperidine N-oxides IaA1B1(Ia)where A1 is hydrogen or an organic radical and B1 is a radical IIa where R1-R4 are each C1-C4-alkyl and R1 and R2, on the one hand, and R3 and R4, on the other hand, may furthermore be bonded to form a 5-membered or 6-membered ring, R5 is H or C114 C4-alkyl and R6 is H or C1-C18-alkyl, are used for stabilizing organic materials against the harmful effect of free radicals, particularly in the distillation of monomers which undergo free radical polymerization, especially styrene.

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