PROCESS FOR PREPARATION OF OPTICALLY ACTIVE 1-SUBSTITUTED AMINO-2,3-EPOXYPROPANES, INTERMEDIATES FOR THE SYNTHESIS THEREOF AND PROCESS FOR PREPARATION OF THE INTERMEDIATES
申请人:KANEKA CORPORATION
公开号:EP1553093A1
公开(公告)日:2005-07-13
The present invention provides an industrial process for effectively and advantageously preparing optically active 1-substituted amino-2,3-epoxypropanes useful as intermediates for preparing agricultural chemicals and medical products from optically active 1-substituted amino-2,3-propanediols used as raw materials. The present invention also provides useful intermediates. Specifically, an optically active 1-substituted amino-2,3-propanediol (1) is reacted with an orthoacid ester (2) or thionyl chloride (3) to produce a cyclic optically active compound (4), and then a compound (5) containing a halogen atom is prepared by reaction with a ring-opening reaction agent having an ability to introduce a halogen atom X. Finally, an optical active 1-substituted amino-2,3-epoxypropane is prepared by ring-closure reaction in the presence of a base.
本发明提供了一种工业过程,用于有效地和有利地制备用作制备农药化学品和医药产品的中间体的光学活性1-取代氨基-2,3-环氧丙烷,所述中间体是以光学活性1-取代氨基-2,3-丙二醇作为原料。本发明还提供了有用的中间体。具体来说,将光学活性1-取代氨基-2,3-丙二醇(1)与醚酸酯(2)或硫酰氯(3)反应,产生一个环状光学活性化合物(4),然后通过与具有引入卤原子X能力的开环反应剂反应,制备含有卤原子的化合物(5)。最后,在碱的存在下通过环闭合反应制备光学活性1-取代氨基-2,3-环氧丙烷。