申请人:Ciba-Geigy Corporation
公开号:US04898977A1
公开(公告)日:1990-02-06
The invention relates to novel processes and intermediates for the preparation of 5-amino-4-hydroxyvaleric acid derivatives of the formula ##STR1## in which R.sup.1 represents hydrogen, optionally substituted alkyl, cycloalkyl, cycloalkyl-lower alkyl, aryl, aryl-lower alkyl or the radical of a natural amino acid, R.sup.2 represents hydrogen, optionally substituted alkyl, cycloalkyl, cycloalkyl-lower alkyl, aryl, aryl-lower alkyl, amino, hydroxy, mercapto, sulphinyl, sulphonyl or the radical of a natural amino acid, and R.sup.3 represents optionally substituted hydroxy or amino, by sigmatropic rearrangement of a suitable allyl ester, halolactonisation of the resulting .gamma.,.delta.-unsaturated acid or of a suitable derivative thereof, exchange of halogen for a nitrogen-containing nucleophile, opening of the lactone ring and freeing of the amino group. Compounds of the formula I are starting materials for the preparation of renin-inhibitors which have an anti-hypertensive action.
该发明涉及一种新型过程和中间体,用于制备公式为##STR1##的5-氨基-4-羟基戊酸衍生物,其中R.sup.1代表氢,可选择取代的烷基,环烷基,环烷基-低烷基,芳基,芳基-低烷基或天然氨基酸的基团,R.sup.2代表氢,可选择取代的烷基,环烷基,环烷基-低烷基,芳基,芳基-低烷基,氨基,羟基,硫醇基,磺酰基或天然氨基酸的基团,R.sup.3代表可选择取代的羟基或氨基,通过适当的烯丙基酯的sigma异构重排,得到合适的.gamma.,.delta.-不饱和酸或其合适衍生物的卤代内酯化,通过卤素与含氮亲核试剂的交换,打开内酯环并释放氨基团。公式I的化合物是制备具有降压作用的肾素抑制剂的起始物质。