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    • 13. 发明授权
    • Processes for the production of 3'-deoxykanamycin A and intermediates
    • 制备3'-脱氧卡那霉素A和中间体的方法
    • US4357466A
    • 1982-11-02
    • US198612
    • 1980-10-20
    • Hamao UmezawaSumio UmezawaTsutomu TsuchiyaTomo Jikihara
    • Hamao UmezawaSumio UmezawaTsutomu TsuchiyaTomo Jikihara
    • C07H15/234C07H15/236A61K31/71C07H15/22
    • C07H15/234
    • 3'-Deoxykanamycin A useful as antibacterial agent is produced from a protected kanamycin A derivative either by a process comprising imidazolylthiocarbonylation of the 3'- and 2"-hydroxyl groups of 4",6"-O-cyclohexylidene-4'-0:6'-N-carbonyl-5,2'-O-isopropylidene-1,3,3"-tri-N-tosylkanamycin A, preferential removal of the 3'-imidazolylthiocarbonyloxy group with tributyltin hydride for the 3'-deoxygenation, followed by removal of the 2"-O-imidazolylthiocarbonyl group with aqueous ammonia, removal of the N-tosyl groups with alkali or alkaline earth metal in liquid ammonia, hydrolytic fission of the 4',6'-cyclic carbamate ring and concurrent removal of the 5,2'-O-isopropylidene group and 4",6"-O-cyclohexylidene group, or by a process comprising selective acetylation of the 2"-hydroxyl group of said protected kanamycin A derivative with acetyl chloride in pyridine, trifluoromethanesulfonylation of the 3'-hydroxyl group, followed by concurrent removal of the 3'-trifluoromethanesulfonyloxy group and N-tosyl groups with alkali metal in liquid ammonia, removal of the 2"-O-acetyl group concurrently with hydrolytic fission of 4',6'-cyclic carbamate, and hydrolytic removal of the 5,2'-O-isopropylidene and 4",6"-O-cyclohexylidene groups.
    • 可用作抗菌剂的3'-脱氧卡那霉素A由受保护的卡那霉素A衍生物制备,其通过包含4',6“-O-亚环己基-4'的3'和2” - 羟基的咪唑基硫代羰基化的方法制备, -0:6'-N-羰基-5,2'-O-异亚丙基-1,3,3“ - 三-N-甲苯磺酰基卡那霉素A,优选用三丁基氢化锡将3'-咪唑硫基羰基氧基除去3' 脱氧,然后用氨水除去2“-O-咪唑基硫代羰基,在液氨中用碱金属或碱土金属除去N-甲苯磺酰基,4',6'-环状氨基甲酸酯环的水解裂变 并且同时去除5,2'-O-异亚丙基和4“,6”-O-亚环己基,或通过包括将所述受保护的卡那霉素A衍生物的2'-羟基选择性乙酰化的方法与 吡啶中的乙酰氯,3'-羟基的三氟甲磺酰化,然后同时除去3'-三氟甲磺酸 氧基和N-甲苯磺酰基与液氨中的碱金属反应,与4',6'-环状氨基甲酸酯的水解裂解同时除去2'-乙酰基,并除去5,2'-O 异亚丙基和4“,6”-O-亚环己基。
    • 15. 发明授权
    • Production of a selectively protected N-acylated derivative of an
aminoglycosidic antibiotic
    • 制备氨基糖苷类抗生素的选择性保护的N-酰化衍生物
    • US4297485A
    • 1981-10-27
    • US90591
    • 1979-11-02
    • Hamao UmezawaSumio UmezawaTsutomu TsuchiyaYasushi TakagiTomo Jikihara
    • Hamao UmezawaSumio UmezawaTsutomu TsuchiyaYasushi TakagiTomo Jikihara
    • C07H15/234C07H23/00C07H15/22
    • C07H23/00C07H15/234
    • Aminoglycosidic antibiotic comprising a 6-0-(3"-aminoglycosyl)-2-deoxystreptamine optionally having a 4-0-(aminogycosyl) group, such as kanamycins, gentamicins, sisomicin, forms reversible complex with zinc cations by association of the zinc cations with some pairs of aminohydroxyl groups in the aminoglycoside, and the zinc-complexed amino groups are blocked from acylation. Reaction of this zinc complex with an acylation reagent having an amino-blocking acyl group brings about acylation of the non-complexed amino groups to give an N-acylated zinc complex, namely a complex of zinc cation with an N-acylated aminoglycosidic antibiotic derivative. Removal of zinc cations from N-acylated zinc complex yields a partially N-acylated aminoglycosidic antibiotic where 1- and 3"-amino groups are unprotected but all other amino groups protected with acyl group. Further reaction of this partially N-acylated product with a certain alkanoic acid or N-formyl-imidazole results in preferential acylation of 3"-amino group without 1-amino group being acylated, affording a 1-N-unprotected and other N-fully-protected derivative of the aminoglycosidic antibiotic which is valuable to be 1-N-acylated with .alpha.-hydroxy-.omega.-aminoalkanoic acid for high-yield production of known semi-synthetic 1-N-(.alpha.-hydroxy-.omega.-aminoalkanoyl)-aminoglycosidic antibiotic.
    • 包含任选具有4-0-(氨基糖基)基团的6-0-(3“ - 氨基糖基)-2-脱氧神经胺的氨基糖苷类抗生素,如卡那霉素,庆大霉素,西索米星,与锌阳离子形成与锌阳离子的可逆复合物, 在氨基糖苷中具有一对氨基羟基的阳离子和锌络合的氨基被封闭以进行酰化。 该锌络合物与具有氨基封闭酰基的酰化试剂的反应导致非络合氨基的酰化,得到N-酰化锌络合物,即锌阳离子与N-酰化氨基糖苷类抗生素衍生物的络合物。 从N-酰化锌络合物中除去锌阳离子产生部分N-酰化的氨基糖苷类抗生素,其中1-和3“ - 氨基未被保护,但是用酰基保护的所有其它氨基。 该部分N-酰化产物与某种链烷酸或N-甲酰基 - 咪唑的进一步反应导致3'-氨基的优先酰化而没有1-氨基被酰化,得到1-N-未保护的和其它N- 氨基糖苷类抗生素的完全保护的衍生物,其有价值的是用α-羟基-ω-氨基链烷酸1-N-酰化,用于高产量生产已知的半合成的1-N-(α-羟基 - ω-氨基烷酰基) 氨基糖苷类抗生素。