The present invention provides a compound which is the trichloroacetic acid salt of a compound of Formula (II) wherein R is selected from the group consisting of H, CH3-, (CH3)2CH-, (CH3)2CHCH2-, CH3CH2CH(CH3)-, and PhCH2-, and a process for its preparation. Formula (II) Also provided is a process for its preparation based on the stereoselective epoxidation of the corresponding olefin precursor and a process for the preparation of several pharmaceutically active ingredients comprising the preparation of the compound of formula (II).
本发明提供了一种化合物,其为公式(II)中化合物的
三氯乙酸盐,其中R从H、
CH3-、( )2CH-、( )2CHCH2-、 CH2CH( )-和PhCH2-所组成的群体中选取,同时提供了一种制备该化合物的方法。公式(II)也提供了一种基于相应
烯烃前体的立体选择性环
氧化反应制备其的方法,并提供了制备几种药物活性成分的方法,包括制备公式(II)化合物的方法。