Methods for preparing antiviral calanolide compounds
    1.
    发明授权
    Methods for preparing antiviral calanolide compounds 失效
    制备抗病毒胼cal体化合物的方法

    公开(公告)号:US06369241B1

    公开(公告)日:2002-04-09

    申请号:US09557821

    申请日:2000-04-25

    IPC分类号: C07D31122

    CPC分类号: C07D493/04 C07D493/14

    摘要: The present invention relates to methods for preparing 2,2-dimethyl-5-acyloxy-10-propyl-2H,8H-benzo[1,2-b:3,4-b′]dipyran-8-one (5) and 2,2-dimethyl-5-hydroxy-10-propyl-2H,8H-benzo[1,2-b:3,4-b′]dipyran-8-one (6) and their use as intermediates for the synthesis of antiviral calanolide compounds. For example, Fries rearrangement on compound 5 or Friedel-Crafts reaction on 6, yields intermediate 2,2-dimethyl-5-hydroxy-6-propionyl-10-propyl-2H,8H-benzo[1,2-b:3,4-b′]dipyran-8-one (4), which, in turn, can be converted to (+)-calanolide A and (−)-calanolide B. The coupling of compound 6 with the appropriate chiral molecule under Mitsunobu or nucleophilic displacement leads to the asymmetric synthesis of antiviral calanolide compounds.

    摘要翻译: 本发明涉及制备2,2-二甲基-5-酰氧基-10-丙基-2H,8H-苯并[1,2-b:3,4-b']二吡喃-8-酮(5)的方法和 2,2-二甲基-5-羟基-10-丙基-2H,8H-苯并[1,2-b:3,4-b']二吡喃-8-酮(6)及其作为合成中间体的用途 抗病毒胼cal体化合物。 例如,化合物5上的Fries重排或6上的Friedel-Crafts反应产生中间体2,2-二甲基-5-羟基-6-丙酰基-10-丙基-2H,8H-苯并[1,2-b:3, 4-b']二吡喃-8-酮(4),其依次可以转化为(+) - 卡立拉内酯A和( - ) - 甘露糖苷B。化合物6与适当的手性分子在Mitsunobu或 亲核取代导致抗病毒胼cal体化合物的不对称合成。

    Downhole tool delivery system with self activating perforation gun with attached perforation hole blocking assembly
    2.
    发明授权
    Downhole tool delivery system with self activating perforation gun with attached perforation hole blocking assembly 有权
    井下工具输送系统,具有自动激活穿孔枪,附带穿孔孔组件

    公开(公告)号:US08950480B1

    公开(公告)日:2015-02-10

    申请号:US13839572

    申请日:2013-03-15

    摘要: A downhole tools deployment apparatus is disclosed. In an embodiment, the apparatus includes at least an in-ground well casing, a housing providing a hermetically sealed electronics compartment, a tool attachment portion, and a first flow through core. The housing is preferably configured for sliding communication with the well casing. The hermetically sealed electronics compartment secures a processor and a location sensing system, which communicates with the processor while interacting exclusively with features of the well casing to determine the location of the housing within the well casing. The embodiment further includes a well plug affixed to the tool attachment portion, the well plug includes a second flow through core capped with a core plug with a core plug release mechanism, which upon activation provides separation between the second flow through core and the core plug, allowing material to flow through said first and second flow through cores.

    摘要翻译: 公开了一种井下工具展开装置。 在一个实施例中,该装置至少包括地下井壳,提供密封电子室的壳体,工具附接部分和通过芯的第一流动。 壳体优选地构造成与井套件滑动连通。 密封电子室保护处理器和位置感测系统,该系统与处理器通信,同时与井套管的特征完全相互作用,以确定壳体在井套管内的位置。 该实施例还包括固定到工具附接部分的井塞,井塞包括通过芯部的第二流动芯,其具有芯塞和芯塞释放机构,其在启动时提供第二流通芯与芯塞之间的间隔 允许材料流过所述第一和第二流通过芯。

    Methods for preparing antiviral calanolide compounds
    3.
    发明授权
    Methods for preparing antiviral calanolide compounds 失效
    制备抗病毒胼cal体化合物的方法

    公开(公告)号:US06420571B2

    公开(公告)日:2002-07-16

    申请号:US09918674

    申请日:2001-07-31

    IPC分类号: C07D49304

    CPC分类号: C07D493/04 C07D493/14

    摘要: The present invention relates to methods for preparing 2,2-dimethyl-5-acyloxy -10-propyl-2H,8H-benzo[1,2-b:3,4-b′]dipyran-8-one (5) and 2,2-dimethyl-5-hydroxy-10 -propyl-2H,8H-benzo[1,2-b:3,4-b′]dipyran-8-one (6) and their use as intermediates for the synthesis of antiviral calanolide compounds. For example, Fries rearrangement on compound 5 or Friedel-Crafts reaction on 6, yields intermediate 2,2-dimethyl-5-hydroxy -6-propionyl-10-propyl-2H,8H-benzo[1,2-b:3,4-b′]dipyran-8-one (4), which, in turn, can be converted to (+)-calanolide A and (−)-calanolide B. The coupling of compound 6 with the appropriate chiral molecule under Mitsunobu or nucleophilic displacement leads to the asymmetric synthesis of antiviral calanolide compounds.

    摘要翻译: 本发明涉及制备2,2-二甲基-5-酰氧基-10-丙基-2H,8H-苯并[1,2-b:3,4-b']二吡喃-8-酮(5)的方法和 2,2-二甲基-5-羟基-10-丙基-2H,8H-苯并[1,2-b:3,4-b']二吡喃-8-酮(6)及其作为合成 抗病毒胼cal体化合物。 例如,化合物5上的Fries重排或6上的Friedel-Crafts反应产生中间体2,2-二甲基-5-羟基-6-丙酰基-10-丙基-2H,8H-苯并[1,2-b:3, 4-b']二吡喃-8-酮(4),其依次可以转化为(+) - 卡立拉内酯A和( - ) - 甘露糖苷B。化合物6与适当的手性分子在Mitsunobu或 亲核取代导致抗病毒胼cal体化合物的不对称合成。