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    • 3. 发明授权
    • 3',4'-Dideoxykanamycin A and
1-N-(S)-.alpha.-hydroxy-.omega.-aminoalkanoyl) derivatives thereof
    • 3',4'-双脱氧卡那霉素A和1-N-(S)-α-羟基-ω-氨基烷酰基)衍生物
    • US4298727A
    • 1981-11-03
    • US114779
    • 1980-01-23
    • Hamao UmezawaSumio UmezawaTsutomu TsuchiyaTomo JikaharaToshiaki Miyake
    • Hamao UmezawaSumio UmezawaTsutomu TsuchiyaTomo JikaharaToshiaki Miyake
    • C07H15/234A61K31/70A61K31/7028A61K31/7034A61K31/7036A61P31/04C07H15/236C07H15/22
    • C07H15/234Y02P20/55
    • 3',4'-Dideoxy derivative and 1-N-((S)-.alpha.-hydroxy-.omega.-aminoalkanoyl)-3',4'-dideoxy derivative of kanamycin A are now synthetized from kanamycin A and show a wider and/or higher antibacterial activity than the parent kanamycin A so that they are useful in therapeutic treatment of infections by gram-negative and gram-positive bacteria, including drug-resistant strains thereof. The production of these new derivatives may be made by preparing a protected kanamycin A derivative having its 3'- and 4'-hydroxyl groups unprotected and having its all or substantially all other functional groups protected from the initial material, kanamycin A, sulfonylating the 3'- and 4'-hydroxyl groups, removing the 3'- and 4'-sulfonyloxy groups from the resulting 3',4'-di-sulfonic acid ester product to give a 3'-eno-kanamycin A derivative, hydrogenating the 3'-eno-kanamycin A derivative to saturate the 3',4'-unsaturated bond and to yield a protected 3',4'-dideoxykanamycin A product, followed by removal of the remainiing protective groups, and optionally further followed by 1-N-acylation of the 1-amino group of the resulting 3',4'-dideoxykanamycin A with an (S)-.alpha.-hydroxy-.omega.-aminoalkanoic acid or its reactive equivalent.
    • 卡那霉素A的3',4'-二脱氧衍生物和1-N - ((S)-α-羟基-ω-氨基烷酰基)-3',4'-二脱氧衍生物现在从卡那霉素A合成并显示出更宽和/ 或更高的抗菌活性,使得它们可用于革兰氏阴性和革兰氏阳性细菌(包括其耐药菌株)的感染的治疗性治疗。 这些新衍生物的生产可以通过制备其未被保护的3'和4'-羟基的保护的卡那霉素A衍生物和其全部或基本上所有其它保护起始材料的卡那霉素A的其他官能团来制备,磺酰化3 '和4'-羟基,从所得的3',4'-二磺酸酯产物中除去3'-和4'-磺酰氧基,得到3'-烯 - 卡那霉素A衍生物,将3 ' - 卡那霉素A衍生物使3',4'-不饱和键饱和并产生受保护的3',4'-二脱氧卡那霉素A产物,然后除去剩余的保护基,并且任选地进一步加入1-N 所得的3',4'-二脱氧卡那霉素A的1-氨基酸与(S)-α-羟基-ω-氨基链烷酸或其反应性等同物的酰基化。
    • 4. 发明授权
    • Process for the production of kanomycin B derivatives and products
obtained therefrom
    • 生产卡那霉素B衍生物的方法及由此获得的产品
    • US4349666A
    • 1982-09-14
    • US196586
    • 1980-10-14
    • Hamao UmezawaSumio UmezawaTsutomu TsuchiyaToshiaki Miyake
    • Hamao UmezawaSumio UmezawaTsutomu TsuchiyaToshiaki Miyake
    • C07H15/234C07H15/236C07H15/22
    • C07H15/234Y02P20/55
    • 3'-Deoxykanamycin B, namely tobramycin is produced in an improved yield with a reduced reaction time under moderate reaction conditions, starting from a penta-N-protected 3'-mono-O-alkyl-, aralkyl- or arylsulfonylated derivative of kanamycin B in which all the 1, 3, 2' and 3"-amino groups and possibly the 6'-amino group have been protected by an arylsulfonyl group, especially tosyl group; the 3'-hydroxyl group of kanamycin B has been alkyl-, aralkyl- or arylsulfonylated; the 4"- and 6"-hydroxyl groups have been blocked with a di-valent hydroxyl-protecting group; and possibly the 4'-hydroxyl group and 6'-amino group have been blocked by being converted into the form of a 4', 6'-cyclic carbamate formed between the 4'-hydroxyl group and the 6'-amino group, by subjecting to a process essentially comprising reaction of said protected kanamycin B derivative with a metal halide for a reaction time of 30 min. to 2 hours at a reaction temperature of 0.degree. C..about.150.degree. C. to produce the corresponding 3'-halo compound, reductive replacement of the 3'-halo group by hydrogen and deprotection.
    • 3-脱氧卡那霉素B,即在中等反应条件下,以5-N保护的3'-单-O-烷基 - 芳烷基 - 或芳基磺酰化衍生物开始,在中等反应条件下,产率提高,产量提高,反应时间缩短。 其中所有1,3,2'和3“ - 氨基和可能的6'-氨基都被芳基磺酰基,尤其是甲苯磺酰基保护; 卡那霉素B的3'-羟基已经是烷基 - ,芳烷基 - 或芳基磺酰化; 4“和6” - 羟基已被二价羟基保护基封闭; 并且可能的4'-羟基和6'-氨基已经通过在4'-羟基和6'-氨基之间形成的4',6'-环状氨基甲酸酯的形式被阻断,通过 进行基本上包含所述受保护的卡那霉素B衍生物与金属卤化物的反应的方法,反应时间为30分钟。 在0℃的反应温度下反应2小时。在150℃降解产生相应的3'-卤代化合物,通过氢还原取代3'-卤代基团并脱保护。
    • 5. 发明授权
    • Satellite delay simulation system
    • 卫星延时仿真系统
    • US4907247A
    • 1990-03-06
    • US314100
    • 1989-02-22
    • Toshiaki MiyakeMikio Ujiie
    • Toshiaki MiyakeMikio Ujiie
    • H04J3/14H04B7/15H04B17/00
    • H04B17/0085
    • Equipment for testing a digital satellite communication system in which multiple digital satellite communication terminals are interconnectable over multiple channels. The equipment includes a single satellite delay simulator intervening between transmit communication terminals and receive communication terminals. The delay simulator is implemented by a satellite delay circuit accommodating multiple channels, and clock matching circuits each being connected to the output or the input of the delay circuit, whereby the communication terminals are individually connectable to the delay circuit via the clock matching circuits. With this configuration, the equipment tests the system by applying a satellite delay simulation to all of the communication terminals, which are operating on independent clocks, at the same time and by using a single satellite delay simulator.
    • 用于测试数字卫星通信系统的设备,其中多个数字卫星通信终端可在多个信道上互连。 该设备包括在发射通信终端和接收通信终端之间插入的单个卫星延迟模拟器。 延迟模拟器由容纳多个通道的卫星延迟电路和每个连接到延迟电路的输出或输入的时钟匹配电路实现,由此通信终端经由时钟匹配电路可分别连接到延迟电路。 通过这种配置,设备通过对同时在独立时钟上运行的所有通信终端应用卫星延迟仿真并通过使用单个卫星延迟模拟器来对系统进行测试。