An optically active morpholino oxobutyric acid hydroxy binaphthalene derivative and its preparation
申请人:Takasago International Corporation
公开号:EP0470702A1
公开(公告)日:1992-02-12
Optically active 4-morpholino-2-(1-naphthylmethyl)-4-oxobutyric acid 2′-hydroxy-1,1′-binaphthalen-2-yl (formula I) is prepared by the reactions:
in an ether solvent at -78° to -45°C for 1-2 hours, to cause enantio-selective alkylation of (A) where X represents a halogen atom,e.g. Br: WSC represents 1-ethyl-3-(3-dimethy-laminopropyl)carbodiimide hydrochloride and DMAP represents 4-dimethylaminopyridine and * represents an asymmetric carbon atom.
Production of the optically active binaphthol is described.
The intermediate (II) is also novel.
The product (I) can be hydrolyed with a base and then reacted with an amine via a peptide link to make a known renin-inhibitory antihypertensive agent in good yield, the ( R ) configuration of which gives higher activity.
光学活性的 4-吗啉基-2-(1-萘甲基)-4-氧代丁酸 2′-羟基-1,1′-联萘-2-基(式 I)是通过反应制备的:
在乙醚溶剂中,于-78°至-45°C下反应1-2小时,使(A)发生对映选择性烷基化,其中X代表卤素原子,如Br:WSC 代表 1-乙基-3-(3-二甲基氨基丙基)碳二亚胺盐酸盐,DMAP 代表 4-二甲基氨基吡啶,* 代表不对称碳原子。
描述了具有光学活性的二萘酚的生产过程。
中间体 (II) 也是新颖的。
产物 (I) 可以用碱水解,然后通过肽链与胺反应,以良好的收率制成一种已知的肾素抑制性降压药,其 ( R ) 构型具有更高的活性。