会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明申请
    • IMPROVED COUPLING ACTIVATORS FOR OLIGONUCLEOTIDE SYNTHESIS
    • 改进的联合激活剂用于寡核苷酸合成
    • WO1998016540A1
    • 1998-04-23
    • PCT/US1997015744
    • 1997-10-08
    • NEXSTAR PHARMACEUTICALS, INC.VARGEESE, ChandraPIEKEN, WolfgangCARTER, Jeffrey, D.YEGGE, John
    • NEXSTAR PHARMACEUTICALS, INC.
    • C07H21/00
    • C07H21/00C07H19/04
    • A method for coupling phosphoramidite monomers with nucleophiles, for example, the 5'-hydroxyl group on the growing oligonucleotide chain, using a coupling activator that is less acidic than and at least as nucleophilic as tetrazole and that provides comparable or better coupling efficiency than tetrazole. The pKa of the coupling activator is between 5.0 and 6.0, preferably between 5.0 and 5.5, and, more preferably, between 5.1 and 5.3. Suitable coupling activators include 4,5-dicyanoimidazole (DCI), 4-alkylthioimidazole, 2-alkylthioimidazole, 2-nitroimidazole, 4-nitroimidazole, 4,5-dihaloimidazole, 4-haloimidazole, 2-haloimidazole and 5-alkoxytetrazole. DCI is the most preferred coupling activator. Alternatively, a combination of an acidic coupling activator and a suitable buffer, such as a tertiary amine, can be employed. The tertiary amine can be a tertiary amine with three alkyl groups or a heterocyclic compound containing one or more tertiary amines. Preferably the tertiary amine is less nucleophilic than DMAP, which is known to cause side reactions at the 6-position oxygen of guanosines due to its relatively high nucleophilicity. N-methylimidazole (NMI) is the preferred tertiary amine.
    • 使用比四唑低至少至少亲核的偶联活化剂,并且提供与四唑相当或更好的偶联效率的亚磷酰胺单体与亲核试剂偶联的方法,例如生长的寡核苷酸链上的5'-羟基 。 偶联活化剂的pKa为5.0至6.0,优选5.0至5.5,更优选为5.1至5.3。 合适的偶联活化剂包括4,5-二氰基咪唑(DCI),4-烷基硫代咪唑,2-烷基硫代咪唑,2-硝基咪唑,4-硝基咪唑,4,5-二卤代咪唑,4-卤代咪唑,2-卤代咪唑和5-烷氧基四唑。 DCI是最优选的偶联活化剂。 或者,可以使用酸性偶合活化剂和合适的缓冲剂如叔胺的组合。 叔胺可以是具有三个烷基的叔胺或含有一个或多个叔胺的杂环化合物。 优选地,叔胺的亲核性低于DMAP,由于其相对高的亲核性,已知它们在鸟苷的6-位氧引起副反应。 N-甲基咪唑(NMI)是优选的叔胺。
    • 8. 发明申请
    • LIPOSOMAL CYCLOSPORIN FORMULATIONS AS AGENTS FOR IMMUNOSUPPRESSION AND MULTIPLE DRUG RESISTANT INDICATIONS
    • 作为免疫抑制剂和多种耐药性物质的药物环磷酰胺制剂
    • WO1996040064A1
    • 1996-12-19
    • PCT/US1996009053
    • 1996-06-06
    • NEXSTAR PHARMACEUTICALS, INC.
    • NEXSTAR PHARMACEUTICALS, INC.MOYNIHAN, Karen, L.ADLER-MOORE, JillCHIANG, Su-Ming
    • A61K09/127
    • A61K38/13A61K9/127
    • Improved liposomal encapsulated cyclosporin formulations are disclosed. The liposomes are efficacious as immunosuppressant agents and in the treatment of drug resistant cancers. The formulations include liposomes comprised of a phosphatidylcholine, cholesterol, a phosphatidylglycerol and a cyclosporin. In one embodiment, the mole ratios of phosphatidylcholine, cholesterol, phosphatidylglycerol and cyclosporin are about 21:0.5:3:1 to 21:1.5:3:1 and 24:0.5:3:1 to 24:1.5:31 wherein the liposomes comprise unilamellar vesicles having a size less than 100 nm. In a preferred embodiment, the compositions are stable upon injection into the blood stream of a mammal, preferably a human. In this embodiment, the preferred ratios of PC:chol:PG:CSA are from about 28:1:3:1 to 40:1:3:1. The preferred formulas are PC:chol:DMPG:CSA wherein the PC is HSPC and the molar ratios are: 28:1:3:1, 30:1:3:1, 32:1:3:1, 34:1:3:1, 35:1:3:1, 36:1:3:1, and 40:1:3:1. Also provided is a liposome encapsulated cyclosporin which provides for a cyclosporin which associates to a significant degree with a liposomal/plasma fraction (vs. cell fraction) of blood as a function of time. Liposomes having these properties are comprised of phosphatidylcholine, cholesterol, dimyristoylphosphatidylglycerol and cyclosporin. These liposomes are unilamellar and have a size less than 75 nanometers and are stable in whole mammal blood. Further provided are liposomes having increased therapeutic indices. The liposomes are stable on storage, contain a therapeutically effective amount of a cyclosporin, provide a liposomal cyclosporin formulation having reduced toxicity, and, in the preferred embodiment, provides a liposomal formulation which is stable in whole blood.
    • 公开了改进的脂质体包封的环孢菌素制剂。 脂质体作为免疫抑制剂和用于治疗耐药性癌症是有效的。 制剂包括由磷脂酰胆碱,胆固醇,磷脂酰甘油和环孢菌素组成的脂质体。 在一个实施方案中,磷脂酰胆碱,胆固醇,磷脂酰甘油和环孢菌素的摩尔比为约21:0.5:3:1至21:1.5:3:1和24:0.5:3:1至24:1.5:31,其中脂质体包含 具有小于100nm尺寸的单层囊泡。 在优选的实施方案中,组合物在注射到哺乳动物,优选人的血液中时是稳定的。 在本实施例中,PC:chol:PG:CSA的优选比例为约28:1:3:1至40:1:3:1。 优选的配方是PC:chol:DMPG:CSA,其中PC是HSPC,摩尔比为:28:1:3:1,30:1:3:1,32:1:3: 3:1,35:1:3:1,36:1:3:1和40:1:3:1。 还提供了一种脂质体包封的环孢菌素,其提供了一种环状细胞,其显着程度地与作为时间的函数的血液的脂质体/血浆部分(相对于细胞部分)相关联。 具有这些性质的脂质体由磷脂酰胆碱,胆固醇,二肉豆蔻酰磷脂酰甘油和环孢菌素组成。 这些脂质体是单层的,其尺寸小于75纳米,在整个哺乳动物血液中是稳定的。 还提供了具有增加的治疗指数的脂质体。 脂质体在储存时稳定,含有治疗有效量的环孢菌素,提供具有降低的毒性的脂质体环孢菌素制剂,并且在优选的实施方案中,提供在全血中稳定的脂质体制剂。