Desacetylcephalosporin sulfones
    11.
    发明授权
    Desacetylcephalosporin sulfones 失效
    去乙酰头孢菌素砜

    公开(公告)号:US4459405A

    公开(公告)日:1984-07-10

    申请号:US442076

    申请日:1982-11-16

    申请人: David A. Hall

    发明人: David A. Hall

    CPC分类号: C12N11/08 C12N11/14

    摘要: 7-(S)-Acylamino-3-hydroxymethyl-3-cephem sulfones are disclosed. These compounds are intermediates in the synthesis of 1-oxa .beta.-lactam antibiotics.

    摘要翻译: 公开了7-(S) - 氨基-3-羟甲基-3-头孢烯砜。 这些化合物是1-氧杂β-内酰胺抗生素合成中的中间体。

    Continuous flow-through mercury cathode electrolysis cell
    12.
    发明授权
    Continuous flow-through mercury cathode electrolysis cell 失效
    连续流通汞阴极电解槽

    公开(公告)号:US3972793A

    公开(公告)日:1976-08-03

    申请号:US616988

    申请日:1975-09-26

    IPC分类号: C25B9/14 C25C1/04

    CPC分类号: C25B9/14

    摘要: A continuous flow-through mercury cathode electrolysis cell is described having a parallel anode and cathode and a non-conductive porous diaphragm separator. The cathode chamber is constructed so as to develop turbulence in the catholyte flowing therethrough to effect the maximum contact between the mercury and the catholyte solute and to promote removal therefrom of any gaseous by-products. Built-in heat exchangers provide efficient control of temperature sensitive electrolyses.

    摘要翻译: 描述了具有平行的阳极和阴极以及不导电的多孔隔膜分离器的连续流通的汞阴极电解池。 阴极室被构造成在流过其中的阴极电解液中产生湍流,以实现汞和阴极电解质溶质之间的最大接触并促进从其中除去任何气体副产物。 内置热交换器可提供对温度敏感电解质的有效控制。

    Torsional vibration damper having helical torsion springs
    14.
    发明授权
    Torsional vibration damper having helical torsion springs 失效
    扭力减振器具有螺旋扭力弹簧

    公开(公告)号:US5464198A

    公开(公告)日:1995-11-07

    申请号:US379000

    申请日:1995-01-27

    IPC分类号: F16F1/06 F16F15/123

    摘要: A torsional vibration damper (1) has an input assembly (2,6,7) and a reactor plate (25) with coil springs (40) circumferentially spaced about a center axis of the damper to absorb vibration between the input assembly and reactor plate. Each coil spring (40) includes a plurality of active coils (50) and partial end coils (44). The active coils have a pitch greater than the diameter (d) of the wire (11) and the partial end coils have a pitch equal to the diameter of the wire. A flattened arcuate surface (42) is formed on the partial end coil which spans less than a full coil turn. A distal tip (46) of the end coil has a thickness that is a fraction of the diameter of the wire that is inversely proportional to the amount of arcuate flattened surface of the end coil section. The gap (66) between the tip and the adjacent coil is also inversely proportional to the amount of arcuate spanning surface of the end coil section.

    摘要翻译: 扭转振动阻尼器(1)具有输入组件(2,6,7)和具有螺旋弹簧(40)的反应器板(25),所述螺旋弹簧围绕阻尼器的中心轴线周向间隔开以吸收输入组件和反应器板之间的振动 。 每个螺旋弹簧(40)包括多个有效线圈(50)和部分端部线圈(44)。 有源线圈的间距大于导线(11)的直径(d),部分端部线圈的间距等于线的直径。 在部分端部线圈上形成平坦的弓形表面(42),其横跨小于整个线圈匝。 端部线圈的远端(46)具有与线端部的弓形扁平表面的量成反比的线的直径的一部分的厚度。 尖端和相邻线圈之间的间隙(66)也与端部线圈段的弓形跨越面的量成反比。

    7-(S)-Acylaminocephalosporin sulfones and process
    16.
    发明授权
    7-(S)-Acylaminocephalosporin sulfones and process 失效
    7-(S) - 氨基头孢菌素砜及方法

    公开(公告)号:US4477660A

    公开(公告)日:1984-10-16

    申请号:US442077

    申请日:1982-11-16

    申请人: David A. Hall

    发明人: David A. Hall

    CPC分类号: C07D501/04 C07D501/26

    摘要: This invention encompasses 7-(S)-acylamino-3-acetoxymethyl-3-cephem-4-carboxylic acid sulfones and the epimerization process for making them. The epimerization process employs an organic nitrogen base reagent having a pKa between about 9.0 to about 11.5. The compounds of this invention are intermediates in the synthesis of 1-oxa-.beta.-lactam antibiotics.

    摘要翻译: 本发明包括7-(S) - 酰基氨基-3-乙酰氧基甲基-3-头孢烯-4-羧酸砜和用于制备它们的差向异构化方法。 差向异构化方法使用pKa在约9.0至约11.5之间的有机氮碱试剂。 本发明的化合物是合成1-氧代-β-内酰胺抗生素的中间体。

    Process for 1-oxa-.beta.-lactams
    17.
    发明授权
    Process for 1-oxa-.beta.-lactams 失效
    1-氧代-β-内酰胺的方法

    公开(公告)号:US4458071A

    公开(公告)日:1984-07-03

    申请号:US442080

    申请日:1982-11-16

    申请人: David A. Hall

    发明人: David A. Hall

    CPC分类号: C07D505/00 Y02P20/55

    摘要: An azetidin-2-one-4-sulfinic acid represented by the formula ##STR1## is reacted with Pb(OAc).sub.4 in liquid SO.sub.2 containing CuII ion to provide isomeric cyclization products of the formulas ##STR2## wherein R is e.g. benzyl, phenoxymethyl, benzyloxy, diphenylmethoxy, and R.sub.1 is a carboxy-protecting group. The products of the process are useful intermediates for 1-oxa-.beta.-lactam antibacterials.

    摘要翻译: 由式(IMAGE)表示的氮杂环丁烷-2-酮-4-亚磺酸与含有CuII离子的液态SO 2中的Pb(OAc)4反应,得到式(VI)的异构环化产物,其中R 是例如 苄基,苯氧基甲基,苄氧基,二苯基甲氧基,R 1为羧基保护基。 该方法的产物是1-氧代-β-内酰胺抗菌剂的有用中间体。