2,3-bis-(poly)(chloromethyl)pyridines
    1.
    发明授权
    2,3-bis-(poly)(chloromethyl)pyridines 失效
    2,3-二 - (聚)(氯甲基)吡啶

    公开(公告)号:US4713460A

    公开(公告)日:1987-12-15

    申请号:US888897

    申请日:1986-07-22

    CPC分类号: C07D213/26

    摘要: Novel 2,3-bis((poly)chloromethyl)pyridines and 3,6-dichloro--2-(polychloromethyl)pyridines were obtained by vapor phase chlorination of 2,3-lutidine. Chlorination at about 350.degree. C. using a 14.4 sec. residence time and a chlorine to 2,3-lutidine mole ratio of about 6.8, for example, produced 2-(chloromethyl)-3-(dichloromethyl) pyridine, 3-(chloromethyl)-2-(dichloromethyl)pyridine, 2,3-bis(dichloromethyl)pyridine, 6-chloro-2,3-bis(dichloromethyl)pyridine, 3-(dichloromethyl)-2-(trichloromethyl)pyridine, 6-chloro-3-(dichloromethyl-2-(trichloromethyl)pyridine, 6-chloro-2-(dichloromethyl)-3-(trichloromethyl)pyridine, and 3,6-dichloro-2-(trichloromethyl)pyridine. The compounds are useful as starting materials for herbicides and pharmaceutical agents.

    Osmotic delivery systems and piston assemblies for use therein
    9.
    发明申请
    Osmotic delivery systems and piston assemblies for use therein 有权
    渗透输送系统和用于其中的活塞组件

    公开(公告)号:US20100185184A1

    公开(公告)日:2010-07-22

    申请号:US12658570

    申请日:2010-02-09

    IPC分类号: A61M31/00 B23P11/00

    摘要: An osmotic delivery system is disclosed for delivering an active agent formulation to a fluid environment. The osmotic delivery system typically comprises a reservoir having a lumen that contains the active agent formulation and an osmotic agent formulation and a piston assembly positioned in the lumen to isolate the active agent formulation from the osmotic agent formulation. The piston assembly typically comprises a body constructed and arranged for positioning in the lumen. The body is typically made of a polymeric material that is, for example, resistant to leaching in an organic solvent. In one embodiment, the body is a columnar body having a rim at a distal end thereof for engaging and sealing against a wall of the reservoir and the piston assembly further comprises a spring retained at the distal end of the columnar body for biasing the rim of the columnar body against the wall of the reservoir.

    摘要翻译: 公开了用于将活性剂制剂递送到流体环境的渗透递送系统。 渗透递送系统通常包括储存器,其具有包含活性剂制剂的内腔和渗透剂制剂以及位于内腔中的活塞组件,以将活性剂制剂与渗透剂制剂隔离。 活塞组件通常包括构造和布置成用于定位在内腔中的主体。 主体通常由例如耐有机溶剂浸出的聚合材料制成。 在一个实施例中,主体是一个柱状体,其具有在其远端处的边缘,用于接合和密封储存器的壁,并且活塞组件还包括保持在柱状体的远端处的弹簧,用于偏置 柱状体抵靠水库的墙壁。