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    Processes for preparing tetrahydropyran-4-one and pyran-4-one
    1.
    发明授权
    Processes for preparing tetrahydropyran-4-one and pyran-4-one 有权
    制备四氢吡喃-4-酮和吡喃-4-酮的方法

    公开(公告)号：US07745649B2

    公开(公告)日：2010-06-29

    申请号：US10583562

    申请日：2004-12-17

    申请人： Shigeyoshi Nishino ,  Kenji Hirotsu ,  Hidetaka Shima ,  Shinobu Suzuki

    发明人： Shigeyoshi Nishino ,  Kenji Hirotsu ,  Hidetaka Shima ,  Shinobu Suzuki

    IPC分类号： C07D309/30

    CPC分类号： C07D309/38 ,  C07C45/00 ,  C07C49/185 ,  C07D309/30

    摘要： The present invention relates to a process for preparing tetrahydropyran-4-one represented by the formula (1): which comprises reacting at least one kind of dihydropyran-4-one and pyran-4-one represented by the formula (2): wherein represents a single bond or a double bond, and hydrogen (a) in the presence of a metal catalyst, in a mixed solvent of an aprotic solvent and an alcohol solvent, or (b) in the presence of an anhydrous metal catalyst in which a hydrated metal catalyst is subjected to dehydration treatment, in a hydrophobic organic solvent.

    摘要翻译： 本发明涉及一种由式（1）表示的四氢吡喃-4-酮的制备方法：其包括使由式（2）表示的至少一种二氢吡喃-4-酮和吡喃-4-酮：其中 表示单键或双键，氢（a）在金属催化剂的存在下，在非质子溶剂和醇溶剂的混合溶剂中，或（b）在无水金属催化剂存在下，其中 水合金属催化剂在疏水性有机溶剂中进行脱水处理。

    Processes for preparing tetrahydropyran-4-one and pyran-4-one
    2.
    发明申请
    Processes for preparing tetrahydropyran-4-one and pyran-4-one 有权
    制备四氢吡喃-4-酮和吡喃-4-酮的方法

    公开(公告)号：US20070078272A1

    公开(公告)日：2007-04-05

    申请号：US10583562

    申请日：2004-12-17

    申请人： Shigeyoshi Nishino ,  Kenji Hirotsu ,  Hidetaka Shima ,  Shinobu Suzuki

    发明人： Shigeyoshi Nishino ,  Kenji Hirotsu ,  Hidetaka Shima ,  Shinobu Suzuki

    IPC分类号： C07D315/00

    CPC分类号： C07D309/38 ,  C07C45/00 ,  C07C49/185 ,  C07D309/30

    摘要： The present invention relates to a process for preparing tetrahydropyran-4-one represented by the formula (1): which comprises reacting at least one kind of dihydropyran-4-one and pyran-4-one represented by the formula (2): wherein represents a single bond or a double bond, and hydrogen (a) in the presence of a metal catalyst, in a mixed solvent of an aprotic solvent and an alcohol solvent, or (b) in the presence of an anhydrous metal catalyst in which a hydrated metal catalyst is subjected to dehydration treatment, in a hydrophobic organic solvent.

    摘要翻译： 本发明涉及一种由式（1）表示的四氢吡喃-4-酮的制备方法：其包括使由式（2）表示的至少一种二氢吡喃-4-酮和吡喃-4-酮：其中 “img id =”custom-character-00001“he =”3.13mm“wi =”6.35mm“file =”US20070078272A1-20070405-P00900.TIF“alt =”custom character“img-content =”character“img-format =“tif”/>表示单键或双键，氢（a）在金属催化剂存在下，在非质子溶剂和醇溶剂的混合溶剂中，或（b）在 在疏水性有机溶剂中，将水合金属催化剂进行脱水处理的无水金属催化剂。

    Processes for preparing alkyl 3-(4-tetrahydropyranyl)-3-oxopropanoate compound and 4-acyltetrahydropyrane
    10.
    发明授权
    Processes for preparing alkyl 3-(4-tetrahydropyranyl)-3-oxopropanoate compound and 4-acyltetrahydropyrane 失效
    制备3-（4-四氢吡喃基）-3-氧代丙酸烷基酯化合物和4-酰基四氢吡喃的方法

    公开(公告)号：US07741497B2

    公开(公告)日：2010-06-22

    申请号：US10583473

    申请日：2004-12-17

    申请人： Shigeyoshi Nishino ,  Kenji Hirotsu ,  Hidetaka Shima ,  Keiji Iwamoto ,  Takashi Harada

    发明人： Shigeyoshi Nishino ,  Kenji Hirotsu ,  Hidetaka Shima ,  Keiji Iwamoto ,  Takashi Harada

    IPC分类号： C07D309/06

    CPC分类号： C07D309/06

    摘要： The present invention is to provide a process for preparing an alkyl 3-(4-tetrahydropyranyl)-3-oxopropanoate compound represented by the formula (1): wherein R1 and R2 may be the same or different from each other, and represent a group which does not participate in the reaction, and R1 and R2 may be bonded to form a ring, and the ring may contain a hetero atom(s), and R3 represents a hydrocarbon group, which comprises reacting 4-acyltetrahydropyran represented by the formula (2): wherein R1 and R2 have the same meanings as defined above, and a carbonic acid diester represented by the formula (3): wherein R3 has the same meanings as defined above, and two R3s may be bonded to each other to form a ring, in the presence of a base, and a process for preparing 4-acyltetrahydropyran.

    摘要翻译： 本发明提供一种制备式（1）表示的3-（4-四氢吡喃基）-3-氧代丙酸烷基酯化合物的方法：其中R 1和R 2可以相同或不同，并且表示基团 其不参与反应，并且R 1和R 2可以键合形成环，并且该环可以含有杂原子，并且R 3表示烃基，其包括使由式（Ⅳ）表示的4-酰基四氢吡喃与 2）：其中R1和R2具有与上述相同的含义，和由式（3）表示的碳酸二酯：其中R 3具有与上述相同的含义，并且两个R 3可以彼此键合形成 在碱的存在下，以及制备4-酰基四氢吡喃的方法。