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    • 1. 发明授权
    • Process for preparing cephalosporanic acid compounds
    • 制备头孢菌素酸化合物的方法
    • US4358588A
    • 1982-11-09
    • US193801
    • 1980-10-03
    • Peter W. HennigerJohannes K. van der DriftGerard J. van VeenJagdish C. Kapur
    • Peter W. HennigerJohannes K. van der DriftGerard J. van VeenJagdish C. Kapur
    • C07D499/12C07D20060101C07D499/00C07D499/64C07D499/68C07D501/06C07D501/20
    • C07D499/00
    • A process for the preparation of [D-.alpha.-amino-p-hydroxyphenylacetamido]-penicillanic acid or cephalosporanic acid compounds comprising reacting a compound having a formula selected from the group consisting of ##STR1## wherein X is selected from the group consisting of hydrogen, acetoxy and five-membered heterocyclic group containing at least one hetero atom of the group consisting of oxygen, sulfur and nitrogen and optionally substituted with e.g. lower alkyl, this residue being attached to the 3-CH.sub.2 group via sulfur atom and wherein a NH radical if present has optionally been silylated with at least one mole equivalent of a silylating agent producing ##STR2## wherein R.sub.1, R.sub.2 and R.sub.3 are individually selected from the group consisting of lower alkyl, benzyl, cycloalkyl and phenyl in an inert anhydrous, organic solvent, preferably a water-inmiscible organic main-solvent, to form a compound having a formula selected from the group consisting of ##STR3## adjusting the pH to a scale value of 5.5 to 7.5 and reacting the resulting compounds in a pre-cooled solution with an at least equimolar amount of a compound of the formula wherein R.sub.4 is lower alkyl, R.sub.5 is selected from the group consisting of hydrogen and lower alkyl and R.sub.6 and R.sub.7 are lower alkoxy.
    • 一种制备[D-α-氨基 - 对 - 羟基苯基乙酰胺基] - 青霉烷酸或头孢菌酸化合物的方法,包括使具有选自以下的化合物:其中X是 选自氢,乙酰氧基和含有至少一个由氧,硫和氮组成的组的杂原子的五元杂环基团,并且任选被例如 低级烷基,该残基通过硫原子连接到3-CH 2基团,其中如果存在的话,NH基团任选用至少一摩尔当量的甲硅烷基化剂进行甲硅烷基化,产生其中R1,R2和R3被单独选择 由低级烷基,苄基,环烷基和苯基组成的组在惰性无水的有机溶剂,优选与水不混溶的有机主要溶剂中形成具有选自以下的化合物:选自下组: IV将pH调节至5.5至7.5的比例值,并将所得化合物与预冷却的溶液与至少等摩尔量的下式化合物反应,其中R 4 是低级烷基,R 5选自氢和低级烷基,R 6和R 7是低级烷氧基。
    • 2. 发明授权
    • 6-diazo-penicillanic acid 1,1-dioxide derivatives
    • 6-重氮 - 青霉烷酸1,1-二氧化物衍生物
    • US5266693A
    • 1993-11-30
    • US880676
    • 1992-05-08
    • Peter W. HennigerJohannes K. van der Drift
    • Peter W. HennigerJohannes K. van der Drift
    • C07D499/00A61K31/425
    • C07D499/00
    • A process for the preparation of at least one compound of a formula selected from the group consisting of ##STR1## and their salts and esters wherein X is selected from the group consisting of hydrogen and a substituent such as halogen and acetoxy comprising diazotizing a compound of the formula ##STR2## and salts and esters thereof wherein X has the above definition and brominating the resulting diazotized compound with at least an equimolar amount of a nitrosating agent in the presence of 1 to 5 equivalents of a strong acid in solution or suspension in a mixture of water and an at least partially water-miscible organic solvent with the amount of water being 1 to 20% by volume containing at least equimolar amounts of hydrogen bromide and bromine which bromo compounds are useful intermediates for the preparation of penicillanic acid-1,1-dioxide and its derivatives and novel 6-diazo-intermediates.
    • 一种制备至少一种选自下组的化合物的方法及其盐和酯,其中X选自氢和取代基,例如卤素和 乙酰氧基,其包括使式III化合物及其盐和酯进行重氮化,其中X具有上述定义,并在至少等摩尔量的亚硝化剂的存在下,将所得重氮化化合物溴化为1至5当量的强 在水和至少部分水混溶性有机溶剂的混合物中的溶液或悬浮液中的酸,其中水的量为1至20体积%,含有至少等摩尔量的溴化氢和溴。该溴化合物是用于 制备青霉烷酸-1,1-二氧化物及其衍生物和新型6-重氮 - 中间体。