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    • 4. 发明授权
    • Method for the preparation of 4'-0-tetrahydropyranyladriamycin b
    • 制备4'-O-四氢吡喃阿霉素的方法b
    • US4818818A
    • 1989-04-04
    • US925774
    • 1986-10-30
    • Hamao Umezawa, deceasedTomio TakeuchiKuniaki TatsutaYoshikazu Takahashi
    • Hamao Umezawa, deceasedTomio TakeuchiKuniaki TatsutaYoshikazu Takahashi
    • A61K31/70A61K31/7028A61K31/7034A61K31/704A61P35/00C07H15/252C07H15/24
    • C07H15/252
    • For the preparation of 4'-0-tetrahydropyranyladriamycin b, the 9,14-position of the starting adriamycin is previously protected with phenylboronic acid and then the 4'-position of the thus protected adriamycin is selectively tetrahydropyranylated. After the tetrahydropyranylation, the by-product of 4'-0-tetrahydropyranyladriamycin a is converted to the aimed product of 4'-0-tetrahydropyranyladriamycin b. The yield of the product of 4'-0-tetrahydropyranyladriamycin b is high.The present invention provides a method for the preparation of 4'-0-tetrahydropyranyladriamycin b, where 3,4-dihydro-2H-pyran is added to a reaction solution containing a 9,14-protected adriamycin as obtained by (a) reacting adriamycin and phenyl-boronic acid or (b) reacting 4'-0-tetrahydropyranyladriamycin b and phenylboronic acid in the presence of an acid catalyst, for 4'-tetrahydropyranylation of the said 9,14-protected adriamycin, and then, the 9,14-protected position of the resulting product is deprotected and 4'-0-tetrahydropyranyladriamycin b is isolated by chromatography with silica-gel.
    • 为了制备4'-O-四氢吡喃阿霉素b,起始阿霉素的9,14位预先用苯基硼酸保护,然后由此保护的阿霉素的4'-位选择性地被四氢吡喃基化。 四氢吡喃基化后,4'-O-四氢吡喃阿霉素a的副产物转化为4'-O-四氢吡喃基阿霉素b的目标产物。 4'-O-四氢吡喃阿霉素b的产物的产率高。 本发明提供了制备4'-O-四氢吡喃阿霉素b的方法,其中将3,4-二氢-2H-吡喃加入到含有9,14-保护的阿霉素的反应溶液中,其通过以下步骤获得:(a)使阿霉素 和苯基硼酸或(b)在酸催化剂存在下使4'-O-四氢吡喃阿霉素b和苯基硼酸反应,进行所述9,14受保护的阿霉素的4'-四氢吡喃基化,然后,9,14 将所得产物的保护位置脱保护,并用硅胶色谱分离4'-O-四氢吡喃基阿霉素b。
    • 10. 发明授权
    • DNA segment containing streptomycin resistance gene and being capable of
controlling expression of said gene
    • 含有链霉素抗性基因并能够控制所述基因表达的DNA片段
    • US5202427A
    • 1993-04-13
    • US659469
    • 1991-02-25
    • Hamao Umezawa, deceasedYoji Umezawa, heirYoji Umezawa, heirYoshiro Okamo, heir
    • Hamao Umezawa, deceasedYoji Umezawa, heirYoji Umezawa, heirYoshiro Okamo, heir
    • C12N9/12C12N15/76
    • C12N15/76C12N9/12
    • A DNA segment of this invention is a DNA fragment of a length of about 3.8 kb which is obtained by excising with a restriction endonuclease Bgl II a hybrid plasmid pST 141 having a length of about 12.6 kb of Streptomyces griseus 4-1 strain (FERM P-7984, namely, FERM BP-1198) to give a Bgl II-Bgl II DNA fragment, and then excising with a restriction endonuclease Sph I the resultant Bgl II-Bgl II DNA fragment having a length of about 7.0 kb and having the restriction endonuclease sites as shown in the restriction endonuclease map of FIG. 1 . This DNA fragment is a DNA which contains a streptomycin resistance gene and contains, in the vicinity of this gene, such a DNA region possessing a function to control the expression of the streptomycin resistance gene. An insertion of this DNA fragment having a length of about 3.8 kb into a suitable actinomycetes plasmid vector can produce such a hybrid plasmid which acts reliably as a selected marker of the streptomycin resistance.
    • 本发明的DNA片段是长约3.8kb的DNA片段,其通过用限制性内切核酸酶Bgl II切割具有长度为约12.6kb的灰色链霉菌4-1菌株(FERM P)的杂交质粒pST141获得 -7984,即FERM BP-1198),得到Bgl II-Bgl II DNA片段,然后用限制性内切核酸酶SphI切割得到长度为约7.0kb并具有约束条件的所得Bgl II-Bgl II DNA片段 如图1的限制性内切核酸酶图所示的内切核酸酶位点。 1。 该DNA片段是含有链霉素抗性基因的DNA,该基因附近含有具有控制链霉素抗性基因表达功能的DNA区域。 将具有约3.8kb长度的该DNA片段插入合适的放线菌质粒载体中可以产生这样的杂交质粒,其可靠地作为链霉素抗性的选择标记物起作用。