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    • 40. 发明授权
    • Process for the preparation of &bgr;-lactam derivatives
    • 制备β-内酰胺衍生物的方法
    • US06458558B1
    • 2002-10-01
    • US09979164
    • 2002-02-11
    • Enrico SivieroWalter CabriDaniele Mario Terrassan
    • Enrico SivieroWalter CabriDaniele Mario Terrassan
    • C12P3500
    • C12P35/02C07D501/00
    • A process for the preparation of Cefuroxime acid (I), which comprises the following steps: (1) Extraction of deacetyl 7-glutaryl ACA (II) aqueous solution at acid pH with organic solvents (for example according to the procedures disclosed in U.S. Pat. No. 5,801,241); (2) drying the resulting solution while preventing lactonization of the intermediate; (3) carbamoylation of the hydroxymethyl group at the 3-position by reaction with chlorosulfonyl isocyanate or similar products; (7) extraction of the carbamoyl derivative from step 3 with water at neutral pH; (8) enzymatic hydrolysis of the amide at the 7-position of the cephalosporanic ring with glutaryl acylase; (6) acylation of the amnino group by condensation with 2-furanyl(sin-methoxyimino)acetic acid chloride or mixed anhydride.
    • 一种制备头孢呋辛酸(I)的方法,其包括以下步骤:(1)在酸性pH下用有机溶剂萃取脱乙酰基-7-戊二酰ACA(II)水溶液(例如根据US Pat 。5,801,241号); (2)干燥所得溶液同时防止中间体的内酯化; (3)通过与氯磺酰基异氰酸酯或类似产物的反应在3-位羟基甲基的氨基甲酰基化; (7)在中性pH下用水萃取步骤3的氨基甲酰基衍生物; (8)用戊二酰基酰化酶在头孢菌素环的7-位酶水解酰胺; (6)通过与2-呋喃基(正 - 甲氧基亚氨基)乙酰氯或混合酸酐缩合来酰胺化氨基。