Brominated sucrose derivatives, compositions and methods of use
    2.
    发明授权
    Brominated sucrose derivatives, compositions and methods of use 失效
    溴化蔗糖衍生物,组合物和使用方法

    公开(公告)号:US4473546A

    公开(公告)日:1984-09-25

    申请号:US379331

    申请日:1982-05-18

    CPC分类号: C07H5/02 A23L27/37

    摘要: Compounds of the general formula (I) are potent sweeteners, especially 4,1',6'-tribromo-4,1',6'-trideoxygalactosucrose: ##STR1## in which R' represents a chlorine or bromine atom;R.sup.2 and R.sup.3 respectively represent a hydroxy group and a hydrogen atom or a hydrogen atom and a chlorine or bromine atom;R.sup.4 represents a chlorine or bromine atom; at least one of R', R.sup.3 and R.sup.4 representing a bromine atom.

    摘要翻译: 通式(I)的化合物是有效的甜味剂,特别是4,1',6'-三溴-4,1',6'-三脱氧半乳糖:其中R'表示氯或溴原子; R2和R3分别表示羟基和氢原子或氢原子和氯或溴原子; R4表示氯或溴原子; R',R 3和R 4中的至少一个表示溴原子。

    Method of preparation of 2-chloro-2-deoxysaccharides
    6.
    发明授权
    Method of preparation of 2-chloro-2-deoxysaccharides 失效
    2-氯-2-脱氧糖的制备方法

    公开(公告)号:US4262115A

    公开(公告)日:1981-04-14

    申请号:US85779

    申请日:1979-10-17

    摘要: A process for the preparation of a 2-chloro-2-deoxy-mono-, di- or oligo-saccharide comprises reaction of a mono-, di- or oligo-saccharide derivative having a free hydroxy group in at least 2- position and having the hydroxy group in at least the 1- and 3- positions protected from chlorination, with sulphuryl chloride in the presence of an organic base in a chlorinated hydrocarbon solvent at a temperature below -40.degree. C. to form a chlorosulphate derivative with a chlorosulphate group in at least the 2-position, which chlorosulphate derivative is then reacted with lithium chloride in the presence of hexamethylphosphoric triamide to replace chlorosulphate groups with chlorine atoms to form a chlorodeoxy derivative, which chlorodeoxy derivative is then freed of unwanted protecting groups.

    摘要翻译: 制备2-氯-2-脱氧 - 单 - ,二 - 或寡糖的方法包括在至少2-位置具有游离羟基的单糖,二糖或寡糖衍生物与 在有机碱存在下,在氯代烃溶剂中,在低于-40℃的温度下,将羟基在至少保护氯化的1-和3-位置上与硫酰氯反应形成氯代硫酸盐衍生物与氯代硫酸盐 在至少2位的基团上,然后将氯代硫酸盐衍生物与氯化锂在六甲基磷酰三胺的存在下反应以用氯原子代替氯代硫酸盐基团以形成氯脱氧衍生物,然后将氯代脱氧衍生物除去不需要的保护基团。

    Trichloro, 6-substituted sucrose compounds, compositions and uses
therefor
    7.
    发明授权
    Trichloro, 6-substituted sucrose compounds, compositions and uses therefor 失效
    三氯,6-取代的蔗糖化合物,组合物和用途

    公开(公告)号:US4612373A

    公开(公告)日:1986-09-16

    申请号:US531604

    申请日:1983-09-12

    摘要: Compounds of the general formula: ##STR1## (in which X represents a hydrogen atom or an alkoxy or arylalkoxy group) are new compounds; those where X represents a hydrogen atom or a methoxy group are potent sweeteners while those with a cleavable 6-ether group are key intermediates in the preparation of 4,1',6'-trichloro-4,1',6'-trideoxygalactosucrose (TGS). They are prepared by chlorinating a sucrose 6-ether, by etherifying a suitably protected derivative of TGS or, in the case where X represents hydrogen, by debromination of 6-bromo-4,1',6'-trichloro-4,6,1',6'-tetradeoxygalactosucrose.

    摘要翻译: 通式为:其中X表示氢原子或烷氧基或芳基烷氧基的化合物是新化合物; 其中X表示氢原子或甲氧基的那些是有效的甜味剂,而具有可切割的6-醚基团的那些是制备4,1',6'-三氯-4,1',6'-三脱氧半乳糖蔗糖的关键中间体 TGS)。 它们通过氯化蔗糖6-醚,通过醚化适当保护的TGS衍生物,或在X表示氢的情况下,通过6-溴-4,1',6'-三氯-4,6, 1',6'-四脱氧半乳糖。

    Sucrose derivatives
    8.
    发明授权
    Sucrose derivatives 失效
    蔗糖衍生物

    公开(公告)号:US4156776A

    公开(公告)日:1979-05-29

    申请号:US800312

    申请日:1977-05-25

    CPC分类号: C07H9/04 C07H13/04 C07H13/08

    摘要: A novel cyclic acetal derivative of sucrose, 4,6-O-isopropylidenesucrose, is prepared by treating sucrose with 2,2-dimethoxypropane in N,N-dimethylformamide, in the presence of p-toluenesulphonic acid, suitably at room temperature. The product is conveniently isolated in the form of its hexa-acetate or hexabenzoate, by treatment with acetic anhydride or benzoyl chloride, respectively, in pyridine. The resulting compounds are valuable as synthetic intermediates and in conformational investigations.

    摘要翻译: 通过在对甲苯磺酸存在下,适当地在室温下,用2,2-二甲氧基丙烷在N,N-二甲基甲酰胺中处理蔗糖来制备蔗糖,4,6-邻异丙基蔗糖的新型环状缩醛衍生物。 通过在吡啶中分别用乙酸酐或苯甲酰氯处理,便可方便地分离其六乙酸酯或六苯甲酸酯的形式。 所得化合物作为合成中间体和构象调查是有价值的。

    Chlorination of sugars
    9.
    发明授权
    Chlorination of sugars 失效
    糖的氯化

    公开(公告)号:US5136031A

    公开(公告)日:1992-08-04

    申请号:US474314

    申请日:1990-07-09

    IPC分类号: C07H5/02 C07H13/04 C07H13/08

    CPC分类号: C07H5/02 C07H13/04 C07H13/08

    摘要: A process for the chlorination of sucrose or a derivative thereof, comprises reaction of the sucrose or derivative thereof with thionyl chloride and a nitrogen base at a ratio of about 1 molar equivalent (ME) of thionyl chloride and about 1 ME of base for every ME of free hydroxyl, in a non-reactive moderately polar solvent. The process is particularly suitable for the preparation of sucralose.

    摘要翻译: 蔗糖或其衍生物的氯化方法包括将蔗糖或其衍生物与亚硫酰氯和氮碱按每摩尔约1摩尔当量(ME)亚硫酰氯和约1ME碱的比例反应 的游离羟基,在非反应性中等极性溶剂中。 该方法特别适用于制备三氯蔗糖。

    Novolak resins containing lactose and/or galactose
    10.
    发明授权
    Novolak resins containing lactose and/or galactose 失效
    含有乳糖和/或半乳糖的酚醛清漆树脂

    公开(公告)号:US4239665A

    公开(公告)日:1980-12-16

    申请号:US043759

    申请日:1979-05-30

    摘要: Resins for use in making resin-coated granules are made by preparing a novolak resin from a phenol and formaldehyde in the presence of lactose and/or galactose, using an acid catalyst. Melt-coating the resin with an amine curing agent on to particulate refractory material gives resin-coated granules which can be moulded to make foundry moulds. The lactose and/or galactose can replace part of the phenol conventionally employed in preparing novolak resins and avoids the need for plasticizers.

    摘要翻译: 用于制备树脂包衣颗粒的树脂通过使用酸催化剂在乳糖和/或半乳糖的存在下由苯酚和甲醛制备酚醛清漆树脂来制备。 将树脂用胺固化剂熔融涂覆在颗粒耐火材料上,得到树脂涂覆的颗粒,可以模塑成型铸造模具。 乳糖和/或半乳糖可以代替常规用于制备酚醛清漆树脂的部分酚,并避免需要增塑剂。