Intermediates for the preparation of 1',1'-disubstituted and
1'-spiro-nucleosides
    71.
    发明授权
    Intermediates for the preparation of 1',1'-disubstituted and 1'-spiro-nucleosides 失效
    用于制备1',1'-二取代和1'-螺 - 核苷的中间体

    公开(公告)号:US5641882A

    公开(公告)日:1997-06-24

    申请号:US521151

    申请日:1995-08-29

    申请人: Philippe Chemla

    发明人: Philippe Chemla

    摘要: The invention relates to a novel process for stereocontrolled preparation of 1',1'-disubstituted and 1'-spiro-nucleosides of the formula I ##STR1## in which the substituents A, R.sub.8 and R.sub.9 are as defined in claim 1, and to novel intermediates and their use in this process and to processes for the preparation of the novel intermediates. The process is illustrated by the example of biologically active (+)-hydantocidin.

    摘要翻译: 本发明涉及用于立体控制制备式I(I)的1',1'-二取代和1'-螺 - 核苷的新方法,其中取代基A,R 8和R 9如权利要求1中所定义 ,以及新型中间体及其在该方法中的用途以及制备新型中间体的方法。 该过程通过生物活性(+) - 海马替丁的实例来说明。

    Process for preparing sugar acetonides
    72.
    发明授权
    Process for preparing sugar acetonides 失效
    制备糖类化合物的方法

    公开(公告)号:US5627272A

    公开(公告)日:1997-05-06

    申请号:US301099

    申请日:1994-09-06

    CPC分类号: C07H9/04

    摘要: A method of preparing sugar acetonides, such as for example 1,2:5,6-Di-O-isopropylidene-.alpha.-D-glucofuranose, by reacting the corresponding sugar, e.g. D-(+)-glucose, with acetone in the presence of a Lewis acid and a carboxylic acid derivative of general formula ##STR1## wherein X is a leaving group which may be readily replaced by a hydroxyl group.

    摘要翻译: 通过使相应的糖例如1,2-二氧杂环己烷-β-D-吡喃葡萄糖反应制备糖类丙烯酸酯,例如1,2:5,6-二-O-异亚丙基-α-D-呋喃葡萄糖的方法。 D - (+) - 葡萄糖与丙酮在路易斯酸和通式为“IMAGE”的羧酸衍生物存在下反应,其中X是可以容易地被羟基取代的离去基团。

    Process for removal of allyl group or allyloxycarbonyl group
    73.
    发明授权
    Process for removal of allyl group or allyloxycarbonyl group 失效
    除去烯丙基或烯丙氧基羰基的方法

    公开(公告)号:US5621084A

    公开(公告)日:1997-04-15

    申请号:US417285

    申请日:1995-04-03

    摘要: This invention relates to a process for the removal of an allyl or allyloxycarbonyl group from an allyl or allyloxycarbonyl group protected compound (such as an allylic ester, carbonate, carbamate, O-allyl derivatives or N-allyl derivatives), which comprises contacting the allyl or allyloxycarbonyl group protected compound with a sulfinic acid compound, in the presence of a palladium catalyst in a reaction-inert solvent. Preferably, the sulfinic acid compound is represented by the formula:X--SO.sub.2 M (I)wherein X is C.sub.1-20 alkyl, substituted C.sub.1-20 alkyl (wherein the substituent(s) are independently halo, nitro, sulfo, oxo, amino, cyano, carboxy, hydroxy or moieties derived therefrom), phenyl, substituted phenyl (wherein the substituent(s) are independently C.sub.1-3 alkyl, halo nitro, sulfo, oxo, amino, cyano, carboxy, hydroxy, acetamido or moieties derived therefrom), furyl or thienyl; and M is hydrogen, an alkali metal or ammonium salt residue. Of these, most preferred sulfinic acid compound is lithium p-toluenesulfinate, sodium p-toluenesulfinate, potassium p-toluenesulfinate, p-toluenesulfinic acid, ammonium p-toluenesulfinate, lithium benzenesulfinate, sodium benzenesulfinate, potassium benzenesulfinate, benzenesulfinic acid or ammonium benzenesulfinate. This invention is well suited to a process for the conversion of an allyl ester of 5R,6S-6-(1R-hydroxyethyl)-2-(1R-oxo-3S-thiolanylthio)-2-penem-3-carboxylic acid to 5R,6S-6-(1R-hydroxyethyl)-2-(1R-oxo-3S-thiolanylthio)-2-penem-3-carboxylic acid.

    摘要翻译: 本发明涉及从烯丙基或烯丙氧基羰基保护的化合物(例如烯丙基酯,碳酸酯,氨基甲酸酯,O-烯丙基衍生物或N-烯丙基衍生物)中除去烯丙基或烯丙氧基羰基的方法,该方法包括使烯丙基 或烯丙氧基羰基保护的化合物与亚磺酸化合物在钯催化剂存在下在反应惰性溶剂中反应。 优选地,亚磺酸化合物由下式表示:X-SO 2 M(I)其中X是C 1-20烷基,取代的C 1-20烷基(其中取代基独立地是卤素,硝基,磺基,氧代,氨基, 氰基,羧基,羟基或由其衍生的部分),苯基,取代的苯基(其中取代基独立地为C 1-3烷基,卤代硝基,磺基,氧代,氨基,氰基,羧基,羟基,乙酰氨基或由其衍生的部分) ,呋喃基或噻吩基; M为氢,碱金属或铵盐残基。 其中最优选的亚磺酸化合物是对甲苯亚磺酸锂,对甲苯亚磺酸钠,对甲苯亚磺酸钾,对甲苯亚磺酸,对甲苯亚磺酸铵,苯亚磺酸锂,苯亚磺酸钠,苯亚磺酸钾,苯亚磺酸或苯亚磺酸铵。 本发明非常适用于将5R,6S-6-(1R-羟乙基)-2-(1R-氧代-3S-硫杂环戊基硫代)-2-青霉烯-3-羧酸的烯丙酯转化成5R ,6S-6-(1R-羟乙基)-2-(1R-氧代-3S-硫杂环戊基硫代)-2-青霉烯-3-羧酸。

    Substrate for measurement of alpha-amylase activity
    76.
    发明授权
    Substrate for measurement of alpha-amylase activity 失效
    用于测量α-淀粉酶活性的底物

    公开(公告)号:US5043436A

    公开(公告)日:1991-08-27

    申请号:US116617

    申请日:1987-11-03

    申请人: Zensuke Ogawa

    发明人: Zensuke Ogawa

    IPC分类号: C07H9/04 C07H15/04 C12Q1/40

    CPC分类号: C07H9/04 C07H15/04 C12Q1/40

    摘要: A substrate for measurement of .alpha.-amylase activity comprising a malto-oligo saccharide respresented by general formula (I) or (V) described below:A--Gn--B (I)A--Gn--I (V)wherein A represents: ##STR1## B represents a monosaccharide or a derivative thereof other than glucose; I represents inositol or a derivative thereof; G represents glucose; and n represents an integer of 3 to 15; in formula (II) or (III), R.sub.1 to R.sub.4 each represents a hydrogen atom, a lower alkyl group or (CH.sub.2)yCOOM (wherein y is 0, 1 or 2 and M represents a hydrogen atom or an alkali metal); and X.sub.1 to X.sub.4 each represents an oxygen atom or a sulfur atom.

    摘要翻译: A-Gn-B(I)A-Gn-I(V)其中A表示:(A)表示的α-淀粉酶活性的底物,其包含由下述通式(I)或(V)表示的麦芽低聚糖: (II)或图像(III)B代表葡萄糖以外的单糖或其衍生物; I表示肌醇或其衍生物; G表示葡萄糖; n表示3〜15的整数, 在式(II)或(III)中,R 1至R 4各自表示氢原子,低级烷基或(CH 2)y COOM(其中y为0,1或2,M表示氢原子或碱金属)。 X1〜X4分别表示氧原子或硫原子。