Kinetic resolution of racemic hydroxy ester via asymmetric catalytic hydrogenation and application thereof
申请人:Zhejiang Jiuzhou Pharmaceutical Co., Ltd
公开号:US20170334831A1
公开(公告)日:2017-11-23
The present invention relates to kinetic resolution of racemic δ-hydroxyl ester via asymmetric catalytic hydrogenation and an application thereof. In the presence of chiral spiro pyridyl phosphine ligand Iridium catalyst and base, racemic δ-hydroxyl esters were subjected to asymmetric catalytic hydrogenation to obtain extent optical purity chiral δ-hydroxyl esters and corresponding 1,5-diols. The method is a new, efficient, highly selective, economical, desirably operable and environmentally friendly method suitable for industrial production. An optically active chiral δ-hydroxyl ester and 1,5-diols can be obtained at very high enantioselectivity and yield with relatively low usage of catalyst. The chiral δ-hydroxyl ester and 1,5-diols obtained by using the method can be used as a critical raw material for asymmetric synthesis of chiral drugs (R)-lisofylline and natural drugs (+)-civet, (−)-indolizidine 167B and (−)-coniine.
本发明涉及通过不对称催化氢化和其应用来进行手性催化剂的动力学分离,通过手性螺旋吡啶膦配体铱催化剂和碱的存在,将混合的δ-羟基酯经过不对称催化氢化,得到了高度光学纯度的手性δ-羟基酯和相应的1,5-二醇。该方法是一种新的、高效的、高度选择性的、经济的、易操作的和环保的方法,适用于工业生产。在相对较低的催化剂用量下,可以以非常高的对映选择性和产率获得手性δ-羟基酯和1,5-二醇。通过使用该方法获得的手性δ-羟基酯和1,5-二醇可以作为手性药物(R)-利索菲林和天然药物(+)-麝香、(-)-吲哚啉167B和(-)-伪麻黄碱的不对称合成的关键原料。