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    21.
    发明专利
    未知

    公开(公告)号：DE602004002245T2

    公开(公告)日：2007-04-05

    申请号：DE602004002245

    申请日：2004-07-05

    Applicant: KAO CORP

    Inventor： UMADA AKIRA ,  ATAKA YOSHIHARU ,  TANAKA SHIGEYOSHI ,  NAITO KAZUKI ,  MINE KOJI

    IPC: C07D309/08 ,  C07D309/18

    Abstract: The invention relates to a process for producing a mixture of a pyran represented by the formula (II) and a hydroxypyran represented by the formula (III) by reacting aldehyde (I) with isoprenol.         R 1 ―CHO     (I) wherein R 1 represents an alkyl or alkenyl group having 1 to 12 carbon atoms, an optionally alkyl- or alkoxy-substituted aryl group having 6 to 12 carbon atoms in total, or the like. Further, the hydroxypyran compound in the resulting mixture is subjected to dehydration reaction in the presence of an acid to produce a pyran compound represented by the formula (II).

    Verfahren zur Erzeugung α-Alkylzimtaldehydverbindungen
    26.
    发明专利
    Verfahren zur Erzeugung α-Alkylzimtaldehydverbindungen 未知

    公开(公告)号：DE102006057296B4

    公开(公告)日：2019-03-28

    申请号：DE102006057296

    申请日：2006-12-05

    Applicant: KAO CORP

    Inventor： UEDA JUNKO ,  TANAKA SHIGEYOSHI

    IPC: C07C45/74 ,  C07C47/232

    Abstract: Verfahren zur Erzeugung einer α-Alkylzimtaldehydverbindung, umfassend die Durchführung einer Kondensationsreaktion einer Benzaldehydverbindung und eines Alkanals in der Gegenwart eines primären Amins und einer organischen Säure, worin das molare Verhältnis der Säuregruppe, die von der organischen Säure stammt, zur NH-Gruppe, die vom primären Amin stammt, (Säuregruppe/NH-Gruppe) von 0,5 bis 20 ist.

    28.
    发明专利
    未知

    公开(公告)号：DE69733524T2

    公开(公告)日：2006-05-11

    申请号：DE69733524

    申请日：1997-09-29

    Applicant: KAO CORP

    Inventor： NISHIOKA TOHRU ,  TANAKA SHIGEYOSHI ,  KOSHINO JUNJI ,  YAMASHITA OSAMU ,  OZAWA TADAHIRO ,  KOHAMA MAKOTO

    IPC: C07D309/18

    Abstract: To provide a simple process for economically preparing a dihydropyrane compound at a high productivity and a high reaction yield. To use a compound selected from the group consisting of a base and a compound (VIII) having a weaker coordination power to the Lewis acid than the aldehyde compound and having an activity to dissolve the Lewis acid, coordinated by the compound (VIII), in a solvent as a co-catalyst in reacting aldehyde with a diene compound in the presence of a Lewis acid to prepare a 5,6-dihydro-2H-pyrane compound represented by formula (III): in which R represents a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, aryl group which may be substituted with alkyl group, having 6 to 12 total carbon atoms; R and R represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.

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