Sucrose derivatives
    1.
    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。

    Process for the preparation of
4,1',6'-trichloro-4,1',6'-trideoxygalactosucrose (TGS)
    3.
    发明授权
    Process for the preparation of 4,1',6'-trichloro-4,1',6'-trideoxygalactosucrose (TGS) 失效
    制备4,1',6'-三氯-4,1',6'-三脱氧半乳糖(TGS)的方法

    公开(公告)号:US4380476A

    公开(公告)日:1983-04-19

    申请号:US275593

    申请日:1981-06-19

    CPC分类号: C07H5/02

    摘要: A process for the preparation of 4,1',6'-trichloro-4,1',6'-trideoxygalactosucrose (TGS) comprising the steps of:(a) reacting sucrose with an acylating reagent under conditions to provide a mixture of acylated sucrose derivatives containing a major proportion of 6-monoacylated material;(b) optionally separating 6-monoacylated sucrose derivative from other acylated derivatives before step (c);(c) reacting the monoacylated sucrose derivative with a chlorinating reagent capable of chlorinating at positions 1', 4 and 6' of a sucrose 6- acylate; and(d) deacylating and separating (in either order) the 4,1',6'-trichloro-4,1',6'-trideoxygalactosucrose material formed.

    摘要翻译: 制备4,1',6'-三氯-4,1',6'-三脱氧半乳糖蔗糖(TGS)的方法,包括以下步骤:(a)在酰化试剂的条件下使蔗糖与酰化试剂反应,得到酰化的 含有主要比例的6-单酰化物质的蔗糖衍生物; (b)在步骤(c)之前任选地将6-单酰化蔗糖衍生物与其它酰化衍生物分离; (c)使单酰化蔗糖衍生物与能够在蔗糖6-酰化物的1',4'和6'位置进行氯化的氯化试剂反应; 和(d)形成的4,1',6'-三氯-4,1',6'-三脱氧半乳蔗糖材料的脱酰和分离(以任何顺序)。

    Trichloro, 6-substituted sucrose compounds, compositions and uses
therefor
    4.
    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。

    Chlorination of sugars
    5.
    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
    7.
    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。