Processes for preparation, isolation and purification of dipeptide
sweeteners
    3.
    发明授权
    Processes for preparation, isolation and purification of dipeptide sweeteners 失效
    二肽甜味剂的制备,分离和纯化方法

    公开(公告)号:US4375430A

    公开(公告)日:1983-03-01

    申请号:US300366

    申请日:1981-09-08

    CPC分类号: C07K5/06113 Y10S530/801

    摘要: Aromatic sulfonic acid salts of certain dipeptide sweeteners which are L-aspartyl-D-alaninamides or L-aspartyl-D-serinamides, each substituted on amide nitrogen with an organic radical having a highly branched carbon skeleton; the process for preparing said salts by crystallization; and utilization of this crystallization process in processes for the preparation, isolation and purification of said amides.

    摘要翻译: 某些二肽甜味剂的芳香磺酸盐是L-天冬氨酰-D-丙氨酰胺或L-天冬氨酰-D-丝氨酰胺,其各自在酰胺氮上被具有高支链碳骨架的有机基团取代; 通过结晶制备所述盐的方法; 以及在制备,分离和纯化所述酰胺的方法中利用该结晶过程。

    Process for biotin intermediates
    5.
    发明授权
    Process for biotin intermediates 失效
    生物素中间体的方法

    公开(公告)号:US4782165A

    公开(公告)日:1988-11-01

    申请号:US90300

    申请日:1987-10-01

    CPC分类号: C07D513/04 C07D233/70

    摘要: In the synthesis of biotin and decarboxybiotin, a more direct method for the conversion of 1,3-diacyl-4-(bromomethyl)-5-[(5-alkoxycarbonylpentanoyl) or hexanoyl]-4-imidazolin-2-ones to 1,3-diacyl-4-[(4-alkoxybutanoyl) or pentanoyl]-1H,3H-thieno (3,4-b)imidazol-2-one via the Bunte salt of the formula ##STR1## wherein R is (C.sub.1 -C.sub.5)alkanoyl or (C.sub.2 -C.sub.5) alkoxycarbonyl, X is methyl or (C.sub.2 -C.sub.5)alkoxycarbonyl an Y is an alkali metal.

    摘要翻译: 在生物素和脱羧基生物素的合成中,将1,3-二酰基-4-(溴甲基)-5 - [(5-烷氧羰基戊酰基)或己酰基] -4-咪唑啉-2-酮转化为1, 3-二酰基-4 - [(4-烷氧基丁酰基)或戊酰基] -1H,3H-噻吩并(3,4-b)咪唑-2-酮,其通式为其中R为(C 1 -C 5) )烷酰基或(C 2 -C 5)烷氧基羰基,X为甲基或(C 2 -C 5)烷氧基羰基,Y为碱金属。

    Process for making a cyclodextrin
    6.
    发明授权
    Process for making a cyclodextrin 失效
    制备环糊精的方法

    公开(公告)号:US6153746A

    公开(公告)日:2000-11-28

    申请号:US106983

    申请日:1998-06-29

    IPC分类号: C08B37/16 C07H1/00

    CPC分类号: C08B37/0012

    摘要: Sulfoalkyl ether cyclodextrins are produced by a process of treating an unsubstituted cyclodextrin starting material with an alkyl sultone in the presence of a base. The base is added in a stepwise, pH controlled manner so that substantially the entire initial charge of cyclodextrin starting material is at least partially reacted. Additional base is then added to complete the reaction, and residual alkyl suftone is destroyed. The product advantageously contains low levels of both residual cyclodextrin and residual alkyl sultone.

    摘要翻译: 磺基烷基醚环糊精通过在碱存在下用烷基磺内酯处理未取代的环糊精起始原料的方法制备。 以逐步,pH控制的方式加入碱,使得基本上环糊精起始原料的全部初始电荷至少部分地反应。 然后加入另外的碱以完成反应,并且残留的烷基磺酸酯被破坏。 产物有利地含有低水平的残留环糊精和残留的烷基磺内酯。

    Process for natamycin recovery
    7.
    发明授权
    Process for natamycin recovery 失效
    游霉素回收方法

    公开(公告)号:US5942611A

    公开(公告)日:1999-08-24

    申请号:US696841

    申请日:1996-08-28

    IPC分类号: C07H1/08 C07H17/08 C07H1/00

    CPC分类号: C07H17/08 C07H1/08

    摘要: A new process for recovering high purity natamycin from fermentation broth containing natamycin comprises the steps of adjusting the pH of the broth to above about 10 and adding an amount of a water-miscible solvent, such as isopropanol, sufficient to dissolve the natamycin in the broth, followed by removing insoluble solids from the pH-adjusted broth, followed by lowering the pH of the broth to a level sufficient to precipitate the natamycin, and removing the natamycin from the broth.

    摘要翻译: PCT No.PCT / IB95 / 00040 Sec。 371日期:1996年8月28日 102(e)日期1996年8月28日PCT提交1995年1月19日PCT公布。 公开号WO95 / 27073 日期1995年10月12日从含有游霉素的发酵液中回收高纯度纳他霉素的新方法包括以下步骤:将培养液的pH调节至约10以上,并加入足量溶解的量的水混溶性溶剂如异丙醇 培养基中的那他霉素,然后从pH调节的肉汤中除去不溶性固体,然后将肉汤的pH降低到足以沉淀那他霉素的水平,并从肉汤中除去那他霉素。

    Reduced polydextrose
    10.
    发明授权
    Reduced polydextrose 失效
    减少的聚葡萄糖

    公开(公告)号:US5601863A

    公开(公告)日:1997-02-11

    申请号:US313940

    申请日:1994-09-28

    摘要: A polydextrose having improved color, flavor and decreased reactivity toward food ingredients having amine functionality. The polydextrose comprises a water-soluble highly branched polydextrose having been prepared by a process which comprises melting dextrose in the presence of a food-acceptable acid catalyst. The improved polydextrose of this invention has substantially no reducing glucose groups. Another aspect of this invention is directed to a method of making the above-described improved polydextrose which comprises exposing unimproved polydextrose to an environment capable of chemically transforming the reducing glucose groups contained in the unimproved polydextrose, thereby substantially eliminating their reducing properties. An improved polymaltose prepared by heating maltose in the presence of a food-acceptable acid catalyst and chemically transforming the reducing glucose groups contained in the polymaltose, thereby eliminating their reducing properties, is also described.

    摘要翻译: 具有改善的颜色,风味和对具有胺官能团的食品成分的反应性降低的聚葡萄糖。 聚右旋糖包含通过包括在食品可接受的酸催化剂存在下熔融葡萄糖的方法制备的水溶性高度支化的聚右旋糖。 本发明的改进的聚右旋糖基本上没有还原葡萄糖基团。 本发明的另一方面涉及制备上述改进的聚右旋糖的方法,其包括将未改良的聚右旋糖暴露于能够化学转化未改良的聚右旋糖中所含的还原葡萄糖基团的环境,从而基本上消除其还原性能。 还描述了通过在食物可接受的酸催化剂的存在下加热麦芽糖并化学转化聚麦芽糖中包含的还原葡萄糖基,从而消除它们的还原性质而制备的改进的聚麦芽糖。