Process for preparing (+)- homopilopic acid
    45.
    发明公开
    Process for preparing (+)- homopilopic acid 失效
    Verfahren zur Herstellung von(+) - Homopilopinsäure。

    公开(公告)号:EP0430555A1

    公开(公告)日:1991-06-05

    申请号:EP90312647.2

    申请日:1990-11-21

    IPC分类号: C12P41/00 C12P17/04

    摘要: A process for preparing (+)-homopilopic acid and the salts thereof which comprises hydrolyzing a mixture of (+)-homopilopic acid ester of the general formula (I):
    wherein R₁ denotes a straight or branched C₁-C₁₀ hydrocarbon, and (-)-homopilopic acid ester of the general formula (II):
    wherein R₂ denotes a straight or branched C₁-C₁₀ hydrocarbon, in the presence of a culture, cells, culture supernatant or treated matter of a microorganism belonging to the genus Arthrobacter , Aspergillus , Escherichia , Cunninghamella , Xanthomonas , Candida , Pseudomonas , Serratia , Cellulomonas , Nocardia , Bacillus , Brevibacterium , Flavobacterium , Mycobacterium , Rhizomucor , Rhodotorula or Rhodococcus .

    摘要翻译: 制备(+) - 均二酸及其盐的方法,其包括水解通式(I)的(+) - 高二酸酯的混合物:其中R 1表示直链或支链C 1 -C 10烃, 和( - ) - 通式(II)的高磷酸酯:其中R2表示直链或支链C1-C10烃,在培养物存在下,细胞,培养物上清液或属于 节杆菌属,曲霉属,埃希氏杆菌属,坎宁汉菌属,黄单胞菌属,假丝酵母​​属,假单胞菌属,沙雷氏菌属,纤维单胞菌属,诺卡氏菌属,芽孢杆菌属,短杆菌属,黄杆菌属,分枝杆菌属,根霉属,红酵母属或红球菌属。

    Method for the production of ribavirin using high ribose donor concentrations
    49.
    发明公开
    Method for the production of ribavirin using high ribose donor concentrations 失效
    Verfahren zur Herstellung von Ribavirin unter Verwendung von hohen Ribose-Donor-Konzentrationen。

    公开(公告)号:EP0307853A2

    公开(公告)日:1989-03-22

    申请号:EP88114937.1

    申请日:1988-09-13

    IPC分类号: C12P19/28

    CPC分类号: C12P19/38 Y10S435/84

    摘要: A method for the production of a 1,2,4-tri­azole nucleoside comprising the step of reacting a ribose donor with a triazole compound in the presence of an enzyme preparation derived from Brevibacterium acetylicum is disclosed. The method is characterized in that the ribose donor is guanosine; the concentra­tion of the donor is above 100 mM; and the enzyme preparation is added before the reaction mix­ture gells. The method is capable of high production rates and high concentrations of the final product.

    摘要翻译: 公开了一种制备1,2,4-三唑核苷的方法,包括在衍生自乙酰微小杆菌的酶制剂存在下使核糖供体与三唑化合物反应的步骤。 该方法的特征在于核糖供体是鸟苷; 供体的浓度高于100mM; 在反应混合物凝胶化之前加入酶制剂。 该方法具有高生产率和高浓度的最终产品。

    Microbiological production of L-Threonine from homoserine
    50.
    发明公开
    Microbiological production of L-Threonine from homoserine 失效
    Mik Mik ung on on on on。。。。。。。。。。

    公开(公告)号:EP0248622A2

    公开(公告)日:1987-12-09

    申请号:EP87304829.2

    申请日:1987-06-01

    IPC分类号: C12P13/08 C12P13/06

    摘要: An aqueous culture medium is prepared containing preferably ethanol and/or glucose as carbon sources and in­organic salts and 0-l-20 w/v of L- or DL-homoserine; cells of biotin requiring microorganism of genus Brevibact­erium , exemplified as 4 strains of Brevibacterium flavum, ammonigenes or divaricatum ,or an immobilized form of these cells are added and they provide enzyme to convert the homoserine to L-threonine by racemization during cultivation at 20 to 50°C for l0 to 72 hours; L-threonine is separated and purified.
    The homoserine can be obtained as residue from enzymatic racemization of DL-homoserine using e.g. a Pseudomonas putida strain.

    摘要翻译: 制备的水性培养基优选含有乙醇和/或葡萄糖作为碳源和无机盐和0-120w / v的L-或DL-高丝氨酸; 添加需要微生物的生物素的细胞,例如作为4种黄色短杆菌,氨基酸或裂殖酵母或这些细胞的固定形式,并且它们提供酶,以在20至50培养期间通过外消旋将高丝氨酸转化为L-苏氨酸 DEG为10〜72小时; L-苏氨酸被分离和纯化。 高丝氨酸可以通过DL-高丝氨酸的酶外消旋化获得作为残基。 恶臭假单胞菌(Pseudomonas putida)菌株。