申请人:Japan Tobacco Inc.
公开号:EP0523248A1
公开(公告)日:1993-01-20
A process for producing compounds represented by general formulae (III) and (IV), which are useful as intermediates for the production of amino acid derivatives which have a renin inhibitory activity and are useful as a hypotensive, stereo-selectively in high yields, which comprises reacting an α-amino aldehyde derivative (I) with a compound (II) in the presence of BF₃ OEt₂ to give an α-amino-β-hydroxy-δ-keto derivative (III) and, if necessary, reducing it into a compound (IV), wherein R¹ represents an amino blocking group; R² represents lower alkyl which may be branched; and R³ represents cyclohexyl or phenyl.
一种以高产率立体选择性生产通式(III)和(IV)所代表的化合物的工艺,这些化合物可用作生产具有肾素抑制活性并可用作降血压剂的氨基酸衍生物的中间体、其中包括在 BF₃ OEt₂ 存在下,使 α-氨基醛衍生物 (I) 与化合物 (II) 反应,得到 α-氨基-β-羟基-δ-酮衍生物 (III),必要时还原成化合物 (IV),其中 R¹ 代表氨基封端基团;R²代表低级烷基,可以是支链烷基;R³代表环己基或苯基。