申请人:TANABE SEIYAKU CO., LTD.
公开号:EP0447135A1
公开(公告)日:1991-09-18
There is disclosed a process for preparing 1,5-benzothiazepine derivatives of the formula:
wherein R¹ is a lower alkyl group,
or a salt thereof which comprises subjecting a propionate derivatives of the formula:
wherein R² is an ester residue and R¹ is the same as defined above, to intramolecular cyclization in the presence of a sulfonic acid compound of the formula:R³ SO₃ H wherein R³ is a lower alkyl group or a substituted or unsubstituted phenyl group, in a non-halogenated organic solvent and, if desired, converting the product to a salt thereof.
本发明公开了一种制备式 1,5-苯并硫氮杂卓衍生物的工艺:
其中 R¹ 为低级烷基、
或其盐的工艺,该工艺包括将式中的丙酸酯衍生物
其中 R² 为酯残基,R¹ 与上述定义相同,在式:R³ SO₃ H 其中 R³ 为低级烷基或取代或未取代苯基的磺酸化合物存在下,在非卤代有机溶剂中进行分子内环化,如果需要,将产物转化为其盐。