申请人:FUJISAWA PHARMACEUTICAL CO., LTD.
公开号:EP0648747A1
公开(公告)日:1995-04-19
A novel intermediate (II) for use in synthesis which is useful for the production of an amino acid derivative (I) having a renin-inhibiting activity, and a process for producing the derivative (I) which involves the reaction step represented by the figure, wherein R¹ represents lower alkyl, etc., which may be substituted by -NR⁷-CO-NR⁸R⁹ (wherein R⁷ represents hydrogen or lower alkyl, and R⁸ and R⁹ may be combined together with the adjacent nitrogen atom to represent an optionally substituted heterocyclic group), etc.; R² represents hydrogen, lower alkyl, etc., R³ represents hydrogen or lower alkyl; R⁴ represents hydrogen or an N-protecting group; R⁵ represents hydrogen or a carboxyl-protecting group; and R¹⁰ represents lower alkyl. This process, proceeding via the intermediate (II), is industrially advantageous because the final product (I) can be obtained in a high yield from an inexpensive starting material as compared with the conventional processes and hence the production cost can be reduced remarkably.
一种用于合成的新型中间体(II),该中间体可用于生产具有肾素抑制活性的氨基酸衍生物(I),以及一种生产该衍生物(I)的工艺,该工艺涉及如图所示的反应步骤,其中 R¹ 代表低级烷基等、R⁷-CO-NR⁸R⁹(其中 R⁷ 代表氢或低级烷基,R⁸ 和 R𠞙 可与相邻的氮原子结合在一起代表任选取代的杂环基团)等取代;R² 代表氢、低级烷基等、R³ 代表氢或低级烷基;R⁴ 代表氢或 N 保护基团;R⁵ 代表氢或羧基保护基团;R¹⁰ 代表低级烷基。与传统工艺相比,这种通过中间体(II)进行的工艺具有工业优势,因为可以从廉价的起始原料中以高产率获得最终产品(I),从而显著降低生产成本。