Process for the production of a cephamycin derivative
    2.
    发明授权
    Process for the production of a cephamycin derivative 失效
    生产头孢霉素衍生物的方法

    公开(公告)号:US4302580A

    公开(公告)日:1981-11-24

    申请号:US185594

    申请日:1980-09-09

    CPC分类号: C12P35/08

    摘要: A chemotherapeutic, antibacterial agent, 7.beta.-[(2D-2-amino-2-carboxy)ethylthioacetamido]-7.alpha.-methoxy-3-[(1-methyl-1H-tetrazole-5-yl)thiomethyl]-3-cephem-4-carboxylic acid is produced economically and efficiently starting from cephamycin A and/or B by a "new route" process comprising the consecutive steps of reaction of cephamycin with 5-mercapto-1-methyl-1H-tetrazole; protection of the terminal amino group thereof by acylation; protection of the two carboxyl groups thereof by esterification; replacement of the acyl group initially having attached to the 7-amino group by a halogenoacetyl group; deprotection of the blocked 4-carboxyl group; and condensation of D-cysteine with the halogenoacetyl group attaching to the 7-amino group.

    摘要翻译: 7β-[(2D-2-氨基-2-羧基)乙硫基乙酰氨基]-7α-甲氧基-3 - [(1-甲基-1H-四唑-5-基)硫代甲基] -3- 头孢霉素-4-羧酸从头孢霉素A和/或B开始通过包含头孢霉素与5-巯基-1-甲基-1H-四唑的连续步骤的“新途径”方法经济有效地产生; 通过酰化保护其末端氨基; 通过酯化保护其两个羧基; 用卤代乙酰基取代最初连接在7-氨基上的酰基; 封闭的4-羧基脱保护; 和D-半胱氨酸与连接于7-氨基的卤代乙酰基缩合。

    Infrared gas burner plate
    4.
    发明授权
    Infrared gas burner plate 失效
    红外气体燃烧器板

    公开(公告)号:US4508502A

    公开(公告)日:1985-04-02

    申请号:US492323

    申请日:1983-05-06

    申请人: Jiro Itoh

    发明人: Jiro Itoh

    IPC分类号: F23D14/14 F23D13/12

    CPC分类号: F23D14/14

    摘要: An infrared gas burner plate of the type in which a sintered plate body formed of a heat resisting material is provided at its front surface with a plurality of grooves crossing one another to define a plurality of intercepting portions and a plurality of convex portions, the plate body being additionally provided with a plurality of burner holes therethrough between the front and rear surfaces thereof and distributed over the grooves and the convex portions. In accordance with the present invention, each of the intersecting groove portions is provided with a small convex portion having the burner hole at its center. More particularly, the small convex portions are frusto-conical in form.

    摘要翻译: 一种红外线气体燃烧器板,其特征在于,由耐热材料形成的烧结板体在其前表面上设置有多个彼此交叉的槽,以限定多个截断部分和多个凸部, 主体还在其前表面和后表面之间还设置有多个燃烧器孔,并分布在凹槽和凸起部分上。 根据本发明,每个相交槽部分设置有在其中心具有燃烧器孔的小凸部。 更具体地,小凸起的形状为截头圆锥形。