申请人:Shionogi & Co., Ltd.
公开号:US05473066A1
公开(公告)日:1995-12-05
Process for stereoselectivity preparing a cis-form of 5-(aminoalkylamino)-1,5-benzothiazepine derivative represented by formula (VI): ##STR1## is provided, said process comprising carrying out a stereoselective addition reaction of an o-(aminoalkylamino) thiophenyl derivative with a trans-substituted glycidic ester at an elevated temperature in a nonpolar solvent in the presence of a divalent or trivalent iron ion to prepare a threo-form intermediate, hydrolyzing the ester group of said intermediate, acetylating the hydroxyl group of said hydrolyzed compound, and subjecting said acetylated compound to a ring closure reaction to obtain the objective compound (VI).
提供一种制备式(VI)所表示的5-(氨基烷基氨基)-1,5-苯并噻唑衍生物的顺式选择性方法,该方法包括在非极性溶剂中,在二价或三价铁离子的存在下,在升高的温度下,通过对o-(氨基烷基氨基)噻吩衍生物和反式取代的环氧酸酯进行立体选择性加成反应,制备出threo-形式的中间体,加水解开中间体的酯基,使其成为羟基化合物,醋酸化羟基化合物,然后将醋酸化合物进行环合反应,以获得目标化合物(VI)。