Stereoselective fusion glycosylation process for preparing
2'-deoxy-2',2'-difluoronucleosides and 2'-deoxy-2'-fluoronucleosides
    3.
    发明授权
    Stereoselective fusion glycosylation process for preparing 2'-deoxy-2',2'-difluoronucleosides and 2'-deoxy-2'-fluoronucleosides 失效
    用于制备2'-脱氧-2',2'-二氟核苷和2'-脱氧-2'-氟核苷的立体选择性融合糖基化方法

    公开(公告)号:US5371210A

    公开(公告)日:1994-12-06

    申请号:US902312

    申请日:1992-06-22

    申请人: Ta-Sen Chou

    发明人: Ta-Sen Chou

    IPC分类号: C07H19/04 C07H1/00 C07H19/00

    CPC分类号: C07H19/04

    摘要: A stereoselective fusion glycosylation process for preparing beta-anomer enriched 2'-deoxy-2',2'-difluoronucleosides and 2'-deoxy-2'-fluoronucleosides is provided which requires reacting an alpha-anomer enriched 2-deoxy-2,2-difluorocarbohydrate or 2-deoxy-2-fluorocarbohydrate with at least 3 molar equivalents of a nucleobase derivative at a temperature sufficient to fuse the carbohydrate and nucleobase; in the absence of a catalyst and a solvent.

    摘要翻译: 提供了用于制备富含β-异头物的2'-脱氧-2',2'-二氟核苷和2'-脱氧-2'-氟核苷的立体选择性融合糖基化方法,其需要使富含α-端基异构体的2-脱氧-2,2'- 二氟碳水化合物或2-脱氧-2-氟碳水化合物与足够融合碳水化合物和核碱基的温度的至少3摩尔当量的核碱基衍生物; 在不存在催化剂和溶剂的情况下。

    Process for and intermediates of 2',2'-difluoronucleosides
    4.
    发明授权
    Process for and intermediates of 2',2'-difluoronucleosides 失效
    2',2'-二氟核苷的方法和中间体

    公开(公告)号:US4965374A

    公开(公告)日:1990-10-23

    申请号:US445139

    申请日:1989-12-04

    IPC分类号: C07D307/33 C07H19/06

    CPC分类号: C07D307/33 C07H19/06

    摘要: The present invention provides a process for preparing lactone intermediates to 2',2'-difluoronucleosides whereby reversion back to the lactone's open chain precursor is minimized and the desired erythro enantiomer can be selectively isolated from an enantiomeric mixture of erythro and threo lactones in crystalline form. Also provided is a process for producing 2'-deoxy-2',2'-difluoronucleosides in about a 1:1 .alpha./.beta. anomeric ratio, and processes for selectively isolating .beta.-2'-deoxy-2',2'-difluorocytidine, or an organic or inorganic acid addition salt thereof, from the 1:1 .alpha./.beta. mixture.

    摘要翻译: 本发明提供了制备2',2'-二氟核苷的内酯中间体的方法,由此使内酯的开链前体的回复被最小化,并且可以从结晶形式的赤式和苏式内酯的对映异构体混合物中选择性分离出所需的赤式对映异构体 。 还提供了以大约1:1的α/β端基异构体比率生产2'-脱氧-2',2'-二氟核苷的方法,以及选择性分离β-2'-脱氧-2',2'-二氟胞苷 ,或其有机或无机酸加成盐,来自1:1的α/β混合物。

    Process for preparing N-chloroimides
    6.
    发明授权
    Process for preparing N-chloroimides 失效
    制备N-氯酰亚胺的方法

    公开(公告)号:US4212977A

    公开(公告)日:1980-07-15

    申请号:US971617

    申请日:1978-12-20

    申请人: Ta-Sen Chou

    发明人: Ta-Sen Chou

    摘要: N-chlorophthalimide, N-chlorosuccinimide, and N-chloroglutarimide are prepared by contacting the corresponding imide with molecular chlorine under substantially non-aqueous conditions in an inert organic solvent in the presence of a poly(4-vinylpyridine)-divinylbenzene copolymer.

    摘要翻译: 通过在聚(4-乙烯基吡啶) - 二乙烯基苯共聚物存在下,在惰性有机溶剂中,基本上不含水条件下使相应的酰亚胺与分子氯接触来制备N-氯邻苯二甲酰亚胺,N-氯代琥珀酰亚胺和N-氯代戊二酰亚胺。

    Process for 3-exomethylenecepham sulfoxides
    7.
    发明授权
    Process for 3-exomethylenecepham sulfoxides 失效
    3-甲磺酰亚砜亚砜的方法

    公开(公告)号:US4190724A

    公开(公告)日:1980-02-26

    申请号:US960346

    申请日:1978-11-13

    申请人: Ta-Sen Chou

    发明人: Ta-Sen Chou

    CPC分类号: C07D501/08 Y02P20/55

    摘要: Process for 3-exomethylenecepham sulfoxides comprising reacting a 2-chlorosulfinylazetidin-4-one ester with stannic chloride in the presence of oxo compounds, for example lower alkyl ethers and lower alkyl ketones, to form a stannic chloride complex with 2-chlorosulfinylazetidinone stabilized with said oxo compounds which, upon treatment with an hydroxy-containing compound such as methyl alcohol, decomposes providing said 3-exomethylenecepham sulfoxide.

    摘要翻译: 3-亚甲基头孢烯亚砜的方法,包括在氧代化合物例如低级烷基醚和低级烷基酮的存在下,使2-氯亚磺酰基氮杂环丁烷-4-酮与氯化锡反应,形成与所述化合物稳定的2-氯亚磺酰基氮杂环丁烷的氯化锡络合物 在用含羟基的化合物如甲醇处理时分解提供所述3-异亚甲基头孢亚砜的氧代化合物。

    Stereoselective glycosylation process for preparing
2'-Deoxy-2',2'-difluoropyrimidine nucleosides and
2'-deoxy-2'-fluoropyrimidine nucleosides and intermediates thereof
    8.
    发明授权
    Stereoselective glycosylation process for preparing 2'-Deoxy-2',2'-difluoropyrimidine nucleosides and 2'-deoxy-2'-fluoropyrimidine nucleosides and intermediates thereof 失效
    用于制备2'-脱氧-2',2'-二氟嘧啶核苷和2'-脱氧-2'-氟嘧啶核苷的立体选择性糖基化方法及其中间体

    公开(公告)号:US5594124A

    公开(公告)日:1997-01-14

    申请号:US044345

    申请日:1993-04-07

    申请人: Ta-Sen Chou

    发明人: Ta-Sen Chou

    CPC分类号: C07H19/04

    摘要: A stereoselective glycosylation process for preparing beta-anomer enriched 2'-deoxy-2',2'-difluoropyrimidine nucleosides and 2'-deoxy-2'-fluoropyrimidine nucleosides which involves reacting an alpha-anomer enriched 2-deoxy-2,2-difluorocarbohydrate or 2-deoxy-2-fluorocarbohydrate with at least a molar equivalent of a pyrimidine nucleobase derivative in a low freezing inert solvent.

    摘要翻译: 用于制备富含β-异头物的2'-脱氧-2,3'-二氟嘧啶核苷和2'-脱氧-2'-氟嘧啶核苷的立体选择性糖基化方法,其包括使富含α-端基异构体的2-脱氧-2,2- 二氟碳水化合物或具有至少摩尔当量的嘧啶核碱衍生物的2-脱氧-2-氟碳水化合物在低冷冻惰性溶剂中。

    Stereoselective fusion glycosylation process for preparing
2'-deoxy-2',2'-difluoronucleosides and 2'-deoxy-2'-fluoronucleosides
    10.
    发明授权
    Stereoselective fusion glycosylation process for preparing 2'-deoxy-2',2'-difluoronucleosides and 2'-deoxy-2'-fluoronucleosides 失效
    用于制备2'-脱氧-2',2'-二氟核苷和2'-脱氧-2'-氟核苷的立体选择性融合糖基化方法

    公开(公告)号:US5401838A

    公开(公告)日:1995-03-28

    申请号:US44343

    申请日:1993-04-07

    申请人: Ta-Sen Chou

    发明人: Ta-Sen Chou

    IPC分类号: C07H19/04 C07H19/073

    CPC分类号: C07H19/04

    摘要: A stereoselective fusion glycosylation process for prearing beta-anomer enriched 2'-deoxy-2',2'-difluoronucleotides and 2'-deoxy-2'-fluoronucleosides by reacting an alpha-anomer enriched 2-deoxy-2,2-difluorocarbohydrate or 2-deoxy-2-fluorcarbohydrate with at least a 3 molar equivalent of a nucleobase derivative at a temperature sufficient to melt the carbohydrate and nucleobase derivative.

    摘要翻译: 通过使富含α-端基异氰酸酯的2-脱氧-2,2-二氟碳水化合物或通过使β-脱水-2'-脱氧-2'-氟代核苷酸 具有至少3摩尔当量的核碱衍生物的2-脱氧-2-氟碳水化合物,其温度足以熔化碳水化合物和核碱基衍生物。