The invention provides a process for preparing a 2,3,4,5-tetrahydro[1,4]benzothiazepine of formula: [I] by reacting a [2-(acylaminoethyl)thio]arene of formula [II] with an aldehyde or a multimer thereof, and with an acid. The invention also provides for first reacting the [2-(acylaminoethyl)thio]arene with the aldehyde or multimer thereof and a base to form an [N-hydroxymethyl-2-[acylaminoethyl)thio]arene of formula [III]; then treating the [N-hydroxymethyl-2-(acylaminoethyl)thio]arene with the acid to form the 2,3,4,5-tetrahydro[1,4]benzothiazepine.
本发明提供了一种制备式为[I]的2,3,4,5-四
氢[1,4]
苯并噻吩的方法,该方法通过将式[II]的[2-(
酰胺基乙基)
硫]
芳烃与醛或其多聚物以及酸反应而得到。本发明还提供首先将[2-(
酰胺基乙基)
硫]
芳烃与醛或其多聚物以及碱反应以形成式[III]的[N-
羟甲基-2-(
酰胺基乙基)
硫]
芳烃;然后用酸处理[N-
羟甲基-2-(
酰胺基乙基)
硫]
芳烃以形成2,3,4,5-四
氢[1,4]
苯并噻吩。