申请人:Hayashi Yujiro
公开号:US20140051874A1
公开(公告)日:2014-02-20
The present invention provides a method that allows production of stereospecific and asymmetrical five-membered ring-containing compounds serving as synthetic intermediates for formation of five-membered rings of prostaglandins and the like, with high yield and excellent stereoselectivity in terms of diastereoselectivity and enantioselectivity in a short process without requiring troublesome procedures such as optical resolution. The method for producing a five-membered ring-containing compound includes a cyclization step of condensing and cyclizing an α,β-unsaturated nitro compound represented by the following chemical formula (I) with a 1,4-butanedione compound, in the presence of a catalyst formed by a compound having a pyrrolidine ring and an optically active α-carbon relative to the nitrogen on the ring, in a water-insoluble organic solvent and/or a non-oxygen atom-containing water-soluble organic solvent so as to produce the five-membered ring-containing compound represented by the following chemical formula (II).
本发明提供了一种方法,允许生产立体特异性和非对称的含五元环化合物,作为合成前体,用于形成前列腺素等含五元环的化合物,该方法在短时间内以高产率和卓越的立体选择性(包括对映选择性和对映异构选择性)进行,而无需进行繁琐的光学分辨过程。生产含五元环化合物的方法包括以下化学式(I)所表示的α,β-不饱和硝基化合物与1,4-丁二酮化合物缩合和环化的环化步骤,在具有吡咯烷环和具有环上氮原子的光学活性α-碳的化合物形成的催化剂存在下,在不溶于水的有机溶剂和/或不含氧原子的水溶性有机溶剂中,以生产以下化学式(II)所表示的含五元环化合物。