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    • 1. 发明申请
    • Methods of preparing substituted tetracyclines with transition metal-based chemistries
    • 用过渡金属化学制备取代四环素的方法
    • US20050187198A1
    • 2005-08-25
    • US11004559
    • 2004-12-03
    • Mark NelsonGlen RennieDarrell Koza
    • Mark NelsonGlen RennieDarrell Koza
    • C07C231/12C07C237/26C07D295/185C07D295/192A61K31/65
    • C07D295/185C07C231/12C07C237/26C07C2603/46C07D295/192
    • The present invention relates to novel chemistries which allow for heretofore unobtainable substituted tetracycline compounds which exhibit significant activity in tetracycline responsive states. The methods disclosed herein utilize reactive tetracycline-based precursor compounds, reactive organic substituent precursors and transition metal catalysts under conditions such that a tetracycline compound substituted with the desired organic substituent is formed. In one embodiment of the invention, a substituted tetracycline compound may be prepared by combining a reactive tetracycline-based precursor compound such as an arene tetracycline diazonium salt, and a reactive organic substituent precursor, e.g., alkenes, substituted alkenes, vinyl monomers, aromatics and heteroaromatics, in the presence of a transition metal catalyst, such as palladium chloride, under conditions such that a tetracycline compound substituted with the organic substituent is formed. Such compounds may optionally act as intermediates for making other compounds, e.g., hydrogenation of unsaturated groups on the substituent.
    • 本发明涉及允许迄今为止在四环素反应状态下表现出显着活性的未获得的取代四环素化合物的新化学物质。 本文公开的方法在形成被所需有机取代基取代的四环素化合物的条件下使用基于活性四环素的前体化合物,反应性有机取代基前体和过渡金属催化剂。 在本发明的一个实施方案中,取代的四环素化合物可以通过将活性四环素类前体化合物如芳族四环素重氮盐和反应性有机取代基前体例如烯烃,取代的烯烃,乙烯基单体,芳族化合物和 在过渡金属催化剂如氯化钯存在下,在形成被有机取代基取代的四环素化合物的条件下,进行杂芳族化合物。 这样的化合物可以任选地用作制备其它化合物的中间体,例如取代基上不饱和基团的氢化。
    • 10. 发明授权
    • Chemistry for effective microbe control with reduced gas phase corrosiveness in pulp and paper processing systems
    • 用于在纸浆和纸张处理系统中降低气相腐蚀性的有效微生物控制的化学
    • US08986606B2
    • 2015-03-24
    • US12472058
    • 2009-05-26
    • Mark NelsonMarko KolariJuhana Ahola
    • Mark NelsonMarko KolariJuhana Ahola
    • A61L2/18D21F1/66C02F1/76C02F1/50C02F103/28
    • D21F1/66C02F1/50C02F1/76C02F2103/28C02F2303/08C02F2303/20
    • Processes for biofilm or microorganism growth control in an aqueous system such as a pulp, paper or board manufacturing system are described in which a halogenated hydantoin is added to the aqueous system in combination with haloamine, chlorine dioxide or a combination thereof. The halogenated hydantoin is preferably a fully or partially halogenated dialkyl hydantoin, and more preferably 5,5-dimethyl hydantoin or 5-methyl-5-ethyl hydantoin. The haloamine is preferably a monohaloamine, dihaloamine, trihaloamine, or a combination thereof, and more preferably monochloramine, monobromamine, bromochloroamine or a combination thereof. The halogenated hydantoin is preferably added to the aqueous system in portions of the system susceptible to gas phase corrosion, such as the short loop of the system, and the haloamine and chlorine dioxide are preferably added to other portions of the system. The halogenated hydantoin and haloamine and/or chlorine dioxide maintain good compatibility with each other in the absence of excess free chlorine.
    • 描述了在水系统如纸浆,纸或板制造系统中的生物膜或微生物生长控制的方法,其中将卤代乙内酰脲与卤胺,二氧化氯或其组合组合加入到水系统中。 卤化乙内酰脲优选为完全或部分卤化的二烷基乙内酰脲,更优选为5,5-二甲基乙内酰脲或5-甲基-5-乙基乙内酰脲。 卤代胺优选为单卤代胺,二卤代胺,三卤代胺或其组合,更优选一氯胺,一溴胺,溴氯胺或其组合。 卤化乙内酰脲优选在易于气相腐蚀的系统的部分系统中加入到水系统中,例如系统的短路,并且卤胺和二氧化氯优选加入系统的其它部分。 卤代乙内酰脲和卤代胺和/或二氧化氯在不存在过量游离氯的情况下保持彼此良好的相容性。